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Finding the Fourth Proportional to 10,865.80, 16,266.30 and 9,699.40

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Solution

The fourth proportional to 10,865.80, 16,266.30 and 9,699.40 is: 14,520.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,865.80 : 16,266.30 = 9,699.40 : x
  2. Step 2: Convert to fraction form
    10,865.80/16,266.30 = 9,699.40/x
  3. Step 3: Cross multiply
    10,865.80x = 16,266.30 × 9,699.40
  4. Step 4: Simplify right side
    10,865.80x = 157,773,350.22
  5. Step 5: Solve for x
    x = 157,773,350.22/10,865.80
  6. Step 6: Final answer
    x = 14,520.18

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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.