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Finding the Fourth Proportional to 10,454.40, 15,638.40 and 8,899.20

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Solution

The fourth proportional to 10,454.40, 15,638.40 and 8,899.20 is: 13,312.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,454.40 : 15,638.40 = 8,899.20 : x
  2. Step 2: Convert to fraction form
    10,454.40/15,638.40 = 8,899.20/x
  3. Step 3: Cross multiply
    10,454.40x = 15,638.40 × 8,899.20
  4. Step 4: Simplify right side
    10,454.40x = 139,169,249.28
  5. Step 5: Solve for x
    x = 139,169,249.28/10,454.40
  6. Step 6: Final answer
    x = 13,312.03

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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.