Home / 28,058.20-38,720.08-15,311.10

Finding the Fourth Proportional to 28,058.20, 38,720.08 and 15,311.10

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Solution

The fourth proportional to 28,058.20, 38,720.08 and 15,311.10 is: 21,129.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,058.20 : 38,720.08 = 15,311.10 : x
  2. Step 2: Convert to fraction form
    28,058.20/38,720.08 = 15,311.10/x
  3. Step 3: Cross multiply
    28,058.20x = 38,720.08 × 15,311.10
  4. Step 4: Simplify right side
    28,058.20x = 592,847,016.89
  5. Step 5: Solve for x
    x = 592,847,016.89/28,058.20
  6. Step 6: Final answer
    x = 21,129.19

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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.