Home / 9,139.48-13,711.38-2,899.78

Finding the Fourth Proportional to 9,139.48, 13,711.38 and 2,899.78

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Solution

The fourth proportional to 9,139.48, 13,711.38 and 2,899.78 is: 4,350.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.48 : 13,711.38 = 2,899.78 : x
  2. Step 2: Convert to fraction form
    9,139.48/13,711.38 = 2,899.78/x
  3. Step 3: Cross multiply
    9,139.48x = 13,711.38 × 2,899.78
  4. Step 4: Simplify right side
    9,139.48x = 39,759,985.50
  5. Step 5: Solve for x
    x = 39,759,985.50/9,139.48
  6. Step 6: Final answer
    x = 4,350.36

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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.