Home / 15,456.69-21,319.30-9,491.65

Finding the Fourth Proportional to 15,456.69, 21,319.30 and 9,491.65

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Solution

The fourth proportional to 15,456.69, 21,319.30 and 9,491.65 is: 13,091.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.69 : 21,319.30 = 9,491.65 : x
  2. Step 2: Convert to fraction form
    15,456.69/21,319.30 = 9,491.65/x
  3. Step 3: Cross multiply
    15,456.69x = 21,319.30 × 9,491.65
  4. Step 4: Simplify right side
    15,456.69x = 202,355,292.41
  5. Step 5: Solve for x
    x = 202,355,292.41/15,456.69
  6. Step 6: Final answer
    x = 13,091.76

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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.