Home / 20,929.86-31,518.59-15,127.02

Finding the Fourth Proportional to 20,929.86, 31,518.59 and 15,127.02

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Solution

The fourth proportional to 20,929.86, 31,518.59 and 15,127.02 is: 22,780.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.86 : 31,518.59 = 15,127.02 : x
  2. Step 2: Convert to fraction form
    20,929.86/31,518.59 = 15,127.02/x
  3. Step 3: Cross multiply
    20,929.86x = 31,518.59 × 15,127.02
  4. Step 4: Simplify right side
    20,929.86x = 476,782,265.67
  5. Step 5: Solve for x
    x = 476,782,265.67/20,929.86
  6. Step 6: Final answer
    x = 22,780.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.