Home / 10,666.72-14,720.16-6,191.20

Finding the Fourth Proportional to 10,666.72, 14,720.16 and 6,191.20

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Solution

The fourth proportional to 10,666.72, 14,720.16 and 6,191.20 is: 8,543.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,666.72 : 14,720.16 = 6,191.20 : x
  2. Step 2: Convert to fraction form
    10,666.72/14,720.16 = 6,191.20/x
  3. Step 3: Cross multiply
    10,666.72x = 14,720.16 × 6,191.20
  4. Step 4: Simplify right side
    10,666.72x = 91,135,454.59
  5. Step 5: Solve for x
    x = 91,135,454.59/10,666.72
  6. Step 6: Final answer
    x = 8,543.91

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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.