Home / 15,856.65-21,876.56-9,478.82

Finding the Fourth Proportional to 15,856.65, 21,876.56 and 9,478.82

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Solution

The fourth proportional to 15,856.65, 21,876.56 and 9,478.82 is: 13,077.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,856.65 : 21,876.56 = 9,478.82 : x
  2. Step 2: Convert to fraction form
    15,856.65/21,876.56 = 9,478.82/x
  3. Step 3: Cross multiply
    15,856.65x = 21,876.56 × 9,478.82
  4. Step 4: Simplify right side
    15,856.65x = 207,363,974.46
  5. Step 5: Solve for x
    x = 207,363,974.46/15,856.65
  6. Step 6: Final answer
    x = 13,077.41

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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.