Home / 15,428.16-21,290.73-8,713.86

Finding the Fourth Proportional to 15,428.16, 21,290.73 and 8,713.86

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Solution

The fourth proportional to 15,428.16, 21,290.73 and 8,713.86 is: 12,025.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.16 : 21,290.73 = 8,713.86 : x
  2. Step 2: Convert to fraction form
    15,428.16/21,290.73 = 8,713.86/x
  3. Step 3: Cross multiply
    15,428.16x = 21,290.73 × 8,713.86
  4. Step 4: Simplify right side
    15,428.16x = 185,524,440.52
  5. Step 5: Solve for x
    x = 185,524,440.52/15,428.16
  6. Step 6: Final answer
    x = 12,025.05

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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.