Home / 28,157.05-38,856.40-15,410.11

Finding the Fourth Proportional to 28,157.05, 38,856.40 and 15,410.11

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Solution

The fourth proportional to 28,157.05, 38,856.40 and 15,410.11 is: 21,265.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157.05 : 38,856.40 = 15,410.11 : x
  2. Step 2: Convert to fraction form
    28,157.05/38,856.40 = 15,410.11/x
  3. Step 3: Cross multiply
    28,157.05x = 38,856.40 × 15,410.11
  4. Step 4: Simplify right side
    28,157.05x = 598,781,398.20
  5. Step 5: Solve for x
    x = 598,781,398.20/28,157.05
  6. Step 6: Final answer
    x = 21,265.77

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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.