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Finding the Fourth Proportional to 8,885.60, 13,331.10 and 4,987.40

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Solution

The fourth proportional to 8,885.60, 13,331.10 and 4,987.40 is: 7,482.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,885.60 : 13,331.10 = 4,987.40 : x
  2. Step 2: Convert to fraction form
    8,885.60/13,331.10 = 4,987.40/x
  3. Step 3: Cross multiply
    8,885.60x = 13,331.10 × 4,987.40
  4. Step 4: Simplify right side
    8,885.60x = 66,487,528.14
  5. Step 5: Solve for x
    x = 66,487,528.14/8,885.60
  6. Step 6: Final answer
    x = 7,482.62

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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.