Home / 28,681.57-39,569.51-21,145.82

Finding the Fourth Proportional to 28,681.57, 39,569.51 and 21,145.82

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Solution

The fourth proportional to 28,681.57, 39,569.51 and 21,145.82 is: 29,173.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,681.57 : 39,569.51 = 21,145.82 : x
  2. Step 2: Convert to fraction form
    28,681.57/39,569.51 = 21,145.82/x
  3. Step 3: Cross multiply
    28,681.57x = 39,569.51 × 21,145.82
  4. Step 4: Simplify right side
    28,681.57x = 836,729,590.97
  5. Step 5: Solve for x
    x = 836,729,590.97/28,681.57
  6. Step 6: Final answer
    x = 29,173.07

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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.