Home / 21,947.28-30,276.36-15,648.72

Finding the Fourth Proportional to 21,947.28, 30,276.36 and 15,648.72

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Solution

The fourth proportional to 21,947.28, 30,276.36 and 15,648.72 is: 21,587.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,947.28 : 30,276.36 = 15,648.72 : x
  2. Step 2: Convert to fraction form
    21,947.28/30,276.36 = 15,648.72/x
  3. Step 3: Cross multiply
    21,947.28x = 30,276.36 × 15,648.72
  4. Step 4: Simplify right side
    21,947.28x = 473,786,280.26
  5. Step 5: Solve for x
    x = 473,786,280.26/21,947.28
  6. Step 6: Final answer
    x = 21,587.47

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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.