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Finding the Fourth Proportional to 28,458.65, 42,652.08 and 14,422.20

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Solution

The fourth proportional to 28,458.65, 42,652.08 and 14,422.20 is: 21,615.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,458.65 : 42,652.08 = 14,422.20 : x
  2. Step 2: Convert to fraction form
    28,458.65/42,652.08 = 14,422.20/x
  3. Step 3: Cross multiply
    28,458.65x = 42,652.08 × 14,422.20
  4. Step 4: Simplify right side
    28,458.65x = 615,136,828.18
  5. Step 5: Solve for x
    x = 615,136,828.18/28,458.65
  6. Step 6: Final answer
    x = 21,615.11

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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.