Home / 15,127.29-20,877.48-9,157.86

Finding the Fourth Proportional to 15,127.29, 20,877.48 and 9,157.86

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Solution

The fourth proportional to 15,127.29, 20,877.48 and 9,157.86 is: 12,638.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,127.29 : 20,877.48 = 9,157.86 : x
  2. Step 2: Convert to fraction form
    15,127.29/20,877.48 = 9,157.86/x
  3. Step 3: Cross multiply
    15,127.29x = 20,877.48 × 9,157.86
  4. Step 4: Simplify right side
    15,127.29x = 191,193,038.99
  5. Step 5: Solve for x
    x = 191,193,038.99/15,127.29
  6. Step 6: Final answer
    x = 12,638.95

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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.