Home / 19,655.20-27,158.70-15,708.88

Finding the Fourth Proportional to 19,655.20, 27,158.70 and 15,708.88

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Solution

The fourth proportional to 19,655.20, 27,158.70 and 15,708.88 is: 21,705.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,655.20 : 27,158.70 = 15,708.88 : x
  2. Step 2: Convert to fraction form
    19,655.20/27,158.70 = 15,708.88/x
  3. Step 3: Cross multiply
    19,655.20x = 27,158.70 × 15,708.88
  4. Step 4: Simplify right side
    19,655.20x = 426,632,759.26
  5. Step 5: Solve for x
    x = 426,632,759.26/19,655.20
  6. Step 6: Final answer
    x = 21,705.85

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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.