Home / 28,127.20-38,807.76-19,620.16

Finding the Fourth Proportional to 28,127.20, 38,807.76 and 19,620.16

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Solution

The fourth proportional to 28,127.20, 38,807.76 and 19,620.16 is: 27,070.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,127.20 : 38,807.76 = 19,620.16 : x
  2. Step 2: Convert to fraction form
    28,127.20/38,807.76 = 19,620.16/x
  3. Step 3: Cross multiply
    28,127.20x = 38,807.76 × 19,620.16
  4. Step 4: Simplify right side
    28,127.20x = 761,414,460.44
  5. Step 5: Solve for x
    x = 761,414,460.44/28,127.20
  6. Step 6: Final answer
    x = 27,070.40

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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.