Home / 28,637.78-39,501.96-20,691.68

Finding the Fourth Proportional to 28,637.78, 39,501.96 and 20,691.68

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Solution

The fourth proportional to 28,637.78, 39,501.96 and 20,691.68 is: 28,541.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,637.78 : 39,501.96 = 20,691.68 : x
  2. Step 2: Convert to fraction form
    28,637.78/39,501.96 = 20,691.68/x
  3. Step 3: Cross multiply
    28,637.78x = 39,501.96 × 20,691.68
  4. Step 4: Simplify right side
    28,637.78x = 817,361,915.69
  5. Step 5: Solve for x
    x = 817,361,915.69/28,637.78
  6. Step 6: Final answer
    x = 28,541.39

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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.