Home / 12,888.11-17,785.30-7,510.20

Finding the Fourth Proportional to 12,888.11, 17,785.30 and 7,510.20

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Solution

The fourth proportional to 12,888.11, 17,785.30 and 7,510.20 is: 10,363.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.11 : 17,785.30 = 7,510.20 : x
  2. Step 2: Convert to fraction form
    12,888.11/17,785.30 = 7,510.20/x
  3. Step 3: Cross multiply
    12,888.11x = 17,785.30 × 7,510.20
  4. Step 4: Simplify right side
    12,888.11x = 133,571,189.20
  5. Step 5: Solve for x
    x = 133,571,189.20/12,888.11
  6. Step 6: Final answer
    x = 10,363.91

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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.