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Finding the Fourth Proportional to 28,369, 42,479.16 and 20,003.76

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Solution

The fourth proportional to 28,369, 42,479.16 and 20,003.76 is: 29,953.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,369 : 42,479.16 = 20,003.76 : x
  2. Step 2: Convert to fraction form
    28,369/42,479.16 = 20,003.76/x
  3. Step 3: Cross multiply
    28,369x = 42,479.16 × 20,003.76
  4. Step 4: Simplify right side
    28,369x = 849,742,921.64
  5. Step 5: Solve for x
    x = 849,742,921.64/28,369
  6. Step 6: Final answer
    x = 29,953.22

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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.