Home / 15,469.81-21,335.15-10,427.40

Finding the Fourth Proportional to 15,469.81, 21,335.15 and 10,427.40

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Solution

The fourth proportional to 15,469.81, 21,335.15 and 10,427.40 is: 14,380.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,469.81 : 21,335.15 = 10,427.40 : x
  2. Step 2: Convert to fraction form
    15,469.81/21,335.15 = 10,427.40/x
  3. Step 3: Cross multiply
    15,469.81x = 21,335.15 × 10,427.40
  4. Step 4: Simplify right side
    15,469.81x = 222,470,143.11
  5. Step 5: Solve for x
    x = 222,470,143.11/15,469.81
  6. Step 6: Final answer
    x = 14,380.92

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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.