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Finding the Fourth Proportional to 28,047.38, 38,706.11 and 15,300.77

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Solution

The fourth proportional to 28,047.38, 38,706.11 and 15,300.77 is: 21,115.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,047.38 : 38,706.11 = 15,300.77 : x
  2. Step 2: Convert to fraction form
    28,047.38/38,706.11 = 15,300.77/x
  3. Step 3: Cross multiply
    28,047.38x = 38,706.11 × 15,300.77
  4. Step 4: Simplify right side
    28,047.38x = 592,233,074.05
  5. Step 5: Solve for x
    x = 592,233,074.05/28,047.38
  6. Step 6: Final answer
    x = 21,115.45

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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.