Home / 21,407.10-29,544.59-11,978.70

Finding the Fourth Proportional to 21,407.10, 29,544.59 and 11,978.70

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Solution

The fourth proportional to 21,407.10, 29,544.59 and 11,978.70 is: 16,532.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,407.10 : 29,544.59 = 11,978.70 : x
  2. Step 2: Convert to fraction form
    21,407.10/29,544.59 = 11,978.70/x
  3. Step 3: Cross multiply
    21,407.10x = 29,544.59 × 11,978.70
  4. Step 4: Simplify right side
    21,407.10x = 353,905,780.23
  5. Step 5: Solve for x
    x = 353,905,780.23/21,407.10
  6. Step 6: Final answer
    x = 16,532.17

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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.