Home / 21,117.28-29,118-15,795.04

Finding the Fourth Proportional to 21,117.28, 29,118 and 15,795.04

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Solution

The fourth proportional to 21,117.28, 29,118 and 15,795.04 is: 21,779.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.28 : 29,118 = 15,795.04 : x
  2. Step 2: Convert to fraction form
    21,117.28/29,118 = 15,795.04/x
  3. Step 3: Cross multiply
    21,117.28x = 29,118 × 15,795.04
  4. Step 4: Simplify right side
    21,117.28x = 459,919,974.72
  5. Step 5: Solve for x
    x = 459,919,974.72/21,117.28
  6. Step 6: Final answer
    x = 21,779.32

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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.