Home / 10,490.80-15,726.48-5,290.64

Finding the Fourth Proportional to 10,490.80, 15,726.48 and 5,290.64

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Solution

The fourth proportional to 10,490.80, 15,726.48 and 5,290.64 is: 7,931.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,490.80 : 15,726.48 = 5,290.64 : x
  2. Step 2: Convert to fraction form
    10,490.80/15,726.48 = 5,290.64/x
  3. Step 3: Cross multiply
    10,490.80x = 15,726.48 × 5,290.64
  4. Step 4: Simplify right side
    10,490.80x = 83,203,144.15
  5. Step 5: Solve for x
    x = 83,203,144.15/10,490.80
  6. Step 6: Final answer
    x = 7,931.06

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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.