Home / 10,355.38-14,290.50-5,639.74

Finding the Fourth Proportional to 10,355.38, 14,290.50 and 5,639.74

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Solution

The fourth proportional to 10,355.38, 14,290.50 and 5,639.74 is: 7,782.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,355.38 : 14,290.50 = 5,639.74 : x
  2. Step 2: Convert to fraction form
    10,355.38/14,290.50 = 5,639.74/x
  3. Step 3: Cross multiply
    10,355.38x = 14,290.50 × 5,639.74
  4. Step 4: Simplify right side
    10,355.38x = 80,594,704.47
  5. Step 5: Solve for x
    x = 80,594,704.47/10,355.38
  6. Step 6: Final answer
    x = 7,782.88

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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.