Home / 20,718.79-28,601.51-12,218.04

Finding the Fourth Proportional to 20,718.79, 28,601.51 and 12,218.04

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Solution

The fourth proportional to 20,718.79, 28,601.51 and 12,218.04 is: 16,866.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.79 : 28,601.51 = 12,218.04 : x
  2. Step 2: Convert to fraction form
    20,718.79/28,601.51 = 12,218.04/x
  3. Step 3: Cross multiply
    20,718.79x = 28,601.51 × 12,218.04
  4. Step 4: Simplify right side
    20,718.79x = 349,454,332.15
  5. Step 5: Solve for x
    x = 349,454,332.15/20,718.79
  6. Step 6: Final answer
    x = 16,866.54

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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.