Home / 15,431.66-21,296.13-8,717.57

Finding the Fourth Proportional to 15,431.66, 21,296.13 and 8,717.57

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Solution

The fourth proportional to 15,431.66, 21,296.13 and 8,717.57 is: 12,030.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.66 : 21,296.13 = 8,717.57 : x
  2. Step 2: Convert to fraction form
    15,431.66/21,296.13 = 8,717.57/x
  3. Step 3: Cross multiply
    15,431.66x = 21,296.13 × 8,717.57
  4. Step 4: Simplify right side
    15,431.66x = 185,650,557.24
  5. Step 5: Solve for x
    x = 185,650,557.24/15,431.66
  6. Step 6: Final answer
    x = 12,030.50

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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.