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Finding the Fourth Proportional to 10,482.40, 15,707.40 and 9,089.20

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Solution

The fourth proportional to 10,482.40, 15,707.40 and 9,089.20 is: 13,619.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,482.40 : 15,707.40 = 9,089.20 : x
  2. Step 2: Convert to fraction form
    10,482.40/15,707.40 = 9,089.20/x
  3. Step 3: Cross multiply
    10,482.40x = 15,707.40 × 9,089.20
  4. Step 4: Simplify right side
    10,482.40x = 142,767,700.08
  5. Step 5: Solve for x
    x = 142,767,700.08/10,482.40
  6. Step 6: Final answer
    x = 13,619.75

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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.