Home / 15,422.40-21,281.40-9,133.56

Finding the Fourth Proportional to 15,422.40, 21,281.40 and 9,133.56

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Solution

The fourth proportional to 15,422.40, 21,281.40 and 9,133.56 is: 12,603.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,422.40 : 21,281.40 = 9,133.56 : x
  2. Step 2: Convert to fraction form
    15,422.40/21,281.40 = 9,133.56/x
  3. Step 3: Cross multiply
    15,422.40x = 21,281.40 × 9,133.56
  4. Step 4: Simplify right side
    15,422.40x = 194,374,943.78
  5. Step 5: Solve for x
    x = 194,374,943.78/15,422.40
  6. Step 6: Final answer
    x = 12,603.42

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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.