Home / 15,856.40-21,876.22-9,478.57

Finding the Fourth Proportional to 15,856.40, 21,876.22 and 9,478.57

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Solution

The fourth proportional to 15,856.40, 21,876.22 and 9,478.57 is: 13,077.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,856.40 : 21,876.22 = 9,478.57 : x
  2. Step 2: Convert to fraction form
    15,856.40/21,876.22 = 9,478.57/x
  3. Step 3: Cross multiply
    15,856.40x = 21,876.22 × 9,478.57
  4. Step 4: Simplify right side
    15,856.40x = 207,355,204.22
  5. Step 5: Solve for x
    x = 207,355,204.22/15,856.40
  6. Step 6: Final answer
    x = 13,077.06

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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.