Home / 8,718.24-12,021.60-7,888.80

Finding the Fourth Proportional to 8,718.24, 12,021.60 and 7,888.80

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Solution

The fourth proportional to 8,718.24, 12,021.60 and 7,888.80 is: 10,877.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.24 : 12,021.60 = 7,888.80 : x
  2. Step 2: Convert to fraction form
    8,718.24/12,021.60 = 7,888.80/x
  3. Step 3: Cross multiply
    8,718.24x = 12,021.60 × 7,888.80
  4. Step 4: Simplify right side
    8,718.24x = 94,835,998.08
  5. Step 5: Solve for x
    x = 94,835,998.08/8,718.24
  6. Step 6: Final answer
    x = 10,877.88

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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.