Home / 10,917.80-15,065.13-6,440.83

Finding the Fourth Proportional to 10,917.80, 15,065.13 and 6,440.83

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Solution

The fourth proportional to 10,917.80, 15,065.13 and 6,440.83 is: 8,887.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,917.80 : 15,065.13 = 6,440.83 : x
  2. Step 2: Convert to fraction form
    10,917.80/15,065.13 = 6,440.83/x
  3. Step 3: Cross multiply
    10,917.80x = 15,065.13 × 6,440.83
  4. Step 4: Simplify right side
    10,917.80x = 97,031,903.65
  5. Step 5: Solve for x
    x = 97,031,903.65/10,917.80
  6. Step 6: Final answer
    x = 8,887.50

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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.