Home / 11,385.12-15,711.39-6,349.40

Finding the Fourth Proportional to 11,385.12, 15,711.39 and 6,349.40

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Solution

The fourth proportional to 11,385.12, 15,711.39 and 6,349.40 is: 8,762.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385.12 : 15,711.39 = 6,349.40 : x
  2. Step 2: Convert to fraction form
    11,385.12/15,711.39 = 6,349.40/x
  3. Step 3: Cross multiply
    11,385.12x = 15,711.39 × 6,349.40
  4. Step 4: Simplify right side
    11,385.12x = 99,757,899.67
  5. Step 5: Solve for x
    x = 99,757,899.67/11,385.12
  6. Step 6: Final answer
    x = 8,762.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.