Home / 15,428.32-21,283.32-10,122.40

Finding the Fourth Proportional to 15,428.32, 21,283.32 and 10,122.40

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Solution

The fourth proportional to 15,428.32, 21,283.32 and 10,122.40 is: 13,963.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.32 : 21,283.32 = 10,122.40 : x
  2. Step 2: Convert to fraction form
    15,428.32/21,283.32 = 10,122.40/x
  3. Step 3: Cross multiply
    15,428.32x = 21,283.32 × 10,122.40
  4. Step 4: Simplify right side
    15,428.32x = 215,438,278.37
  5. Step 5: Solve for x
    x = 215,438,278.37/15,428.32
  6. Step 6: Final answer
    x = 13,963.82

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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.