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Finding the Fourth Proportional to 10,657.80, 15,972.30 and 9,419.40

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Solution

The fourth proportional to 10,657.80, 15,972.30 and 9,419.40 is: 14,116.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,657.80 : 15,972.30 = 9,419.40 : x
  2. Step 2: Convert to fraction form
    10,657.80/15,972.30 = 9,419.40/x
  3. Step 3: Cross multiply
    10,657.80x = 15,972.30 × 9,419.40
  4. Step 4: Simplify right side
    10,657.80x = 150,449,482.62
  5. Step 5: Solve for x
    x = 150,449,482.62/10,657.80
  6. Step 6: Final answer
    x = 14,116.37

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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.