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Finding the Fourth Proportional to 10,977.40, 16,433.70 and 9,681.40

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Solution

The fourth proportional to 10,977.40, 16,433.70 and 9,681.40 is: 14,493.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,977.40 : 16,433.70 = 9,681.40 : x
  2. Step 2: Convert to fraction form
    10,977.40/16,433.70 = 9,681.40/x
  3. Step 3: Cross multiply
    10,977.40x = 16,433.70 × 9,681.40
  4. Step 4: Simplify right side
    10,977.40x = 159,101,223.18
  5. Step 5: Solve for x
    x = 159,101,223.18/10,977.40
  6. Step 6: Final answer
    x = 14,493.53

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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.