Home / 20,518.12-28,332.30-12,562.90

Finding the Fourth Proportional to 20,518.12, 28,332.30 and 12,562.90

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Solution

The fourth proportional to 20,518.12, 28,332.30 and 12,562.90 is: 17,347.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.12 : 28,332.30 = 12,562.90 : x
  2. Step 2: Convert to fraction form
    20,518.12/28,332.30 = 12,562.90/x
  3. Step 3: Cross multiply
    20,518.12x = 28,332.30 × 12,562.90
  4. Step 4: Simplify right side
    20,518.12x = 355,935,851.67
  5. Step 5: Solve for x
    x = 355,935,851.67/20,518.12
  6. Step 6: Final answer
    x = 17,347.39

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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.