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Finding the Fourth Proportional to 28,070, 38,734.76 and 15,494.64

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Solution

The fourth proportional to 28,070, 38,734.76 and 15,494.64 is: 21,381.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,070 : 38,734.76 = 15,494.64 : x
  2. Step 2: Convert to fraction form
    28,070/38,734.76 = 15,494.64/x
  3. Step 3: Cross multiply
    28,070x = 38,734.76 × 15,494.64
  4. Step 4: Simplify right side
    28,070x = 600,181,161.69
  5. Step 5: Solve for x
    x = 600,181,161.69/28,070
  6. Step 6: Final answer
    x = 21,381.59

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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.