Home / 15,378.29-21,221.95-8,666.08

Finding the Fourth Proportional to 15,378.29, 21,221.95 and 8,666.08

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Solution

The fourth proportional to 15,378.29, 21,221.95 and 8,666.08 is: 11,959.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,378.29 : 21,221.95 = 8,666.08 : x
  2. Step 2: Convert to fraction form
    15,378.29/21,221.95 = 8,666.08/x
  3. Step 3: Cross multiply
    15,378.29x = 21,221.95 × 8,666.08
  4. Step 4: Simplify right side
    15,378.29x = 183,910,977.85
  5. Step 5: Solve for x
    x = 183,910,977.85/15,378.29
  6. Step 6: Final answer
    x = 11,959.13

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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.