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Finding the Fourth Proportional to 28,411.80, 42,583.64 and 20,079.32

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Solution

The fourth proportional to 28,411.80, 42,583.64 and 20,079.32 is: 30,094.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,411.80 : 42,583.64 = 20,079.32 : x
  2. Step 2: Convert to fraction form
    28,411.80/42,583.64 = 20,079.32/x
  3. Step 3: Cross multiply
    28,411.80x = 42,583.64 × 20,079.32
  4. Step 4: Simplify right side
    28,411.80x = 855,050,534.32
  5. Step 5: Solve for x
    x = 855,050,534.32/28,411.80
  6. Step 6: Final answer
    x = 30,094.91

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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.