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Finding the Fourth Proportional to 38,079.57, 52,549.80 and 21,312.57

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Solution

The fourth proportional to 38,079.57, 52,549.80 and 21,312.57 is: 29,411.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,079.57 : 52,549.80 = 21,312.57 : x
  2. Step 2: Convert to fraction form
    38,079.57/52,549.80 = 21,312.57/x
  3. Step 3: Cross multiply
    38,079.57x = 52,549.80 × 21,312.57
  4. Step 4: Simplify right side
    38,079.57x = 1,119,971,290.99
  5. Step 5: Solve for x
    x = 1,119,971,290.99/38,079.57
  6. Step 6: Final answer
    x = 29,411.34

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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.