Home / 15,416.55-21,275.79-8,699.72

Finding the Fourth Proportional to 15,416.55, 21,275.79 and 8,699.72

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Solution

The fourth proportional to 15,416.55, 21,275.79 and 8,699.72 is: 12,006.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,416.55 : 21,275.79 = 8,699.72 : x
  2. Step 2: Convert to fraction form
    15,416.55/21,275.79 = 8,699.72/x
  3. Step 3: Cross multiply
    15,416.55x = 21,275.79 × 8,699.72
  4. Step 4: Simplify right side
    15,416.55x = 185,093,309.40
  5. Step 5: Solve for x
    x = 185,093,309.40/15,416.55
  6. Step 6: Final answer
    x = 12,006.14

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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.