Home / 21,134.79-29,144.70-15,470.46

Finding the Fourth Proportional to 21,134.79, 29,144.70 and 15,470.46

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Solution

The fourth proportional to 21,134.79, 29,144.70 and 15,470.46 is: 21,333.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,134.79 : 29,144.70 = 15,470.46 : x
  2. Step 2: Convert to fraction form
    21,134.79/29,144.70 = 15,470.46/x
  3. Step 3: Cross multiply
    21,134.79x = 29,144.70 × 15,470.46
  4. Step 4: Simplify right side
    21,134.79x = 450,881,915.56
  5. Step 5: Solve for x
    x = 450,881,915.56/21,134.79
  6. Step 6: Final answer
    x = 21,333.64

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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.