Home / 28,143.19-38,838.82-15,567.94

Finding the Fourth Proportional to 28,143.19, 38,838.82 and 15,567.94

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Solution

The fourth proportional to 28,143.19, 38,838.82 and 15,567.94 is: 21,484.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.19 : 38,838.82 = 15,567.94 : x
  2. Step 2: Convert to fraction form
    28,143.19/38,838.82 = 15,567.94/x
  3. Step 3: Cross multiply
    28,143.19x = 38,838.82 × 15,567.94
  4. Step 4: Simplify right side
    28,143.19x = 604,640,283.41
  5. Step 5: Solve for x
    x = 604,640,283.41/28,143.19
  6. Step 6: Final answer
    x = 21,484.43

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Half scale
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Double scale
Find fourth proportional to 28,144.19, 38,840.20 and 15,568.94
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.