Home / 21,347.40-29,458.80-11,915.76

Finding the Fourth Proportional to 21,347.40, 29,458.80 and 11,915.76

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Solution

The fourth proportional to 21,347.40, 29,458.80 and 11,915.76 is: 16,443.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,347.40 : 29,458.80 = 11,915.76 : x
  2. Step 2: Convert to fraction form
    21,347.40/29,458.80 = 11,915.76/x
  3. Step 3: Cross multiply
    21,347.40x = 29,458.80 × 11,915.76
  4. Step 4: Simplify right side
    21,347.40x = 351,023,990.69
  5. Step 5: Solve for x
    x = 351,023,990.69/21,347.40
  6. Step 6: Final answer
    x = 16,443.41

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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.