Home / 15,615.38-21,548.90-8,901.36

Finding the Fourth Proportional to 15,615.38, 21,548.90 and 8,901.36

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Solution

The fourth proportional to 15,615.38, 21,548.90 and 8,901.36 is: 12,283.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,615.38 : 21,548.90 = 8,901.36 : x
  2. Step 2: Convert to fraction form
    15,615.38/21,548.90 = 8,901.36/x
  3. Step 3: Cross multiply
    15,615.38x = 21,548.90 × 8,901.36
  4. Step 4: Simplify right side
    15,615.38x = 191,814,538.76
  5. Step 5: Solve for x
    x = 191,814,538.76/15,615.38
  6. Step 6: Final answer
    x = 12,283.69

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Half scale
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Double scale
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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.