Home / 15,661.67-21,617.15-9,689.81

Finding the Fourth Proportional to 15,661.67, 21,617.15 and 9,689.81

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Solution

The fourth proportional to 15,661.67, 21,617.15 and 9,689.81 is: 13,374.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.67 : 21,617.15 = 9,689.81 : x
  2. Step 2: Convert to fraction form
    15,661.67/21,617.15 = 9,689.81/x
  3. Step 3: Cross multiply
    15,661.67x = 21,617.15 × 9,689.81
  4. Step 4: Simplify right side
    15,661.67x = 209,465,919.71
  5. Step 5: Solve for x
    x = 209,465,919.71/15,661.67
  6. Step 6: Final answer
    x = 13,374.43

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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.