Home / 21,701.40-29,947.50-12,748.20

Finding the Fourth Proportional to 21,701.40, 29,947.50 and 12,748.20

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Solution

The fourth proportional to 21,701.40, 29,947.50 and 12,748.20 is: 17,592.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,701.40 : 29,947.50 = 12,748.20 : x
  2. Step 2: Convert to fraction form
    21,701.40/29,947.50 = 12,748.20/x
  3. Step 3: Cross multiply
    21,701.40x = 29,947.50 × 12,748.20
  4. Step 4: Simplify right side
    21,701.40x = 381,776,719.50
  5. Step 5: Solve for x
    x = 381,776,719.50/21,701.40
  6. Step 6: Final answer
    x = 17,592.26

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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.