Home / 19,619.72-29,432.28-7,138.16

Finding the Fourth Proportional to 19,619.72, 29,432.28 and 7,138.16

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Solution

The fourth proportional to 19,619.72, 29,432.28 and 7,138.16 is: 10,708.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,619.72 : 29,432.28 = 7,138.16 : x
  2. Step 2: Convert to fraction form
    19,619.72/29,432.28 = 7,138.16/x
  3. Step 3: Cross multiply
    19,619.72x = 29,432.28 × 7,138.16
  4. Step 4: Simplify right side
    19,619.72x = 210,092,323.80
  5. Step 5: Solve for x
    x = 210,092,323.80/19,619.72
  6. Step 6: Final answer
    x = 10,708.22

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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.