Home / 19,720.16-29,565.64-9,319.76

Finding the Fourth Proportional to 19,720.16, 29,565.64 and 9,319.76

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Solution

The fourth proportional to 19,720.16, 29,565.64 and 9,319.76 is: 13,972.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720.16 : 29,565.64 = 9,319.76 : x
  2. Step 2: Convert to fraction form
    19,720.16/29,565.64 = 9,319.76/x
  3. Step 3: Cross multiply
    19,720.16x = 29,565.64 × 9,319.76
  4. Step 4: Simplify right side
    19,720.16x = 275,544,669.05
  5. Step 5: Solve for x
    x = 275,544,669.05/19,720.16
  6. Step 6: Final answer
    x = 13,972.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.