Home / 20,760.88-28,656.12-14,475.28

Finding the Fourth Proportional to 20,760.88, 28,656.12 and 14,475.28

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Solution

The fourth proportional to 20,760.88, 28,656.12 and 14,475.28 is: 19,980.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.88 : 28,656.12 = 14,475.28 : x
  2. Step 2: Convert to fraction form
    20,760.88/28,656.12 = 14,475.28/x
  3. Step 3: Cross multiply
    20,760.88x = 28,656.12 × 14,475.28
  4. Step 4: Simplify right side
    20,760.88x = 414,805,360.71
  5. Step 5: Solve for x
    x = 414,805,360.71/20,760.88
  6. Step 6: Final answer
    x = 19,980.14

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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.