Home / 15,525.15-21,423.20-8,717.61

Finding the Fourth Proportional to 15,525.15, 21,423.20 and 8,717.61

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Solution

The fourth proportional to 15,525.15, 21,423.20 and 8,717.61 is: 12,029.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,525.15 : 21,423.20 = 8,717.61 : x
  2. Step 2: Convert to fraction form
    15,525.15/21,423.20 = 8,717.61/x
  3. Step 3: Cross multiply
    15,525.15x = 21,423.20 × 8,717.61
  4. Step 4: Simplify right side
    15,525.15x = 186,759,058.96
  5. Step 5: Solve for x
    x = 186,759,058.96/15,525.15
  6. Step 6: Final answer
    x = 12,029.45

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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.