Home / 15,985.79-22,089.71-15,217.61

Finding the Fourth Proportional to 15,985.79, 22,089.71 and 15,217.61

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Solution

The fourth proportional to 15,985.79, 22,089.71 and 15,217.61 is: 21,028.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,985.79 : 22,089.71 = 15,217.61 : x
  2. Step 2: Convert to fraction form
    15,985.79/22,089.71 = 15,217.61/x
  3. Step 3: Cross multiply
    15,985.79x = 22,089.71 × 15,217.61
  4. Step 4: Simplify right side
    15,985.79x = 336,152,519.39
  5. Step 5: Solve for x
    x = 336,152,519.39/15,985.79
  6. Step 6: Final answer
    x = 21,028.21

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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.