Home / 20,788.31-31,068.54-15,177.80

Finding the Fourth Proportional to 20,788.31, 31,068.54 and 15,177.80

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Solution

The fourth proportional to 20,788.31, 31,068.54 and 15,177.80 is: 22,683.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.31 : 31,068.54 = 15,177.80 : x
  2. Step 2: Convert to fraction form
    20,788.31/31,068.54 = 15,177.80/x
  3. Step 3: Cross multiply
    20,788.31x = 31,068.54 × 15,177.80
  4. Step 4: Simplify right side
    20,788.31x = 471,552,108.22
  5. Step 5: Solve for x
    x = 471,552,108.22/20,788.31
  6. Step 6: Final answer
    x = 22,683.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.