Home / 20,510.61-28,304.65-11,079.17

Finding the Fourth Proportional to 20,510.61, 28,304.65 and 11,079.17

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Solution

The fourth proportional to 20,510.61, 28,304.65 and 11,079.17 is: 15,289.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.61 : 28,304.65 = 11,079.17 : x
  2. Step 2: Convert to fraction form
    20,510.61/28,304.65 = 11,079.17/x
  3. Step 3: Cross multiply
    20,510.61x = 28,304.65 × 11,079.17
  4. Step 4: Simplify right side
    20,510.61x = 313,592,029.14
  5. Step 5: Solve for x
    x = 313,592,029.14/20,510.61
  6. Step 6: Final answer
    x = 15,289.26

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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.