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Finding the Fourth Proportional to 20,700.60, 31,050.90 and 10,842.90

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Solution

The fourth proportional to 20,700.60, 31,050.90 and 10,842.90 is: 16,264.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.60 : 31,050.90 = 10,842.90 : x
  2. Step 2: Convert to fraction form
    20,700.60/31,050.90 = 10,842.90/x
  3. Step 3: Cross multiply
    20,700.60x = 31,050.90 × 10,842.90
  4. Step 4: Simplify right side
    20,700.60x = 336,681,803.61
  5. Step 5: Solve for x
    x = 336,681,803.61/20,700.60
  6. Step 6: Final answer
    x = 16,264.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.