Home / 12,287.76-18,431.55-5,710.29

Finding the Fourth Proportional to 12,287.76, 18,431.55 and 5,710.29

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Solution

The fourth proportional to 12,287.76, 18,431.55 and 5,710.29 is: 8,565.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,287.76 : 18,431.55 = 5,710.29 : x
  2. Step 2: Convert to fraction form
    12,287.76/18,431.55 = 5,710.29/x
  3. Step 3: Cross multiply
    12,287.76x = 18,431.55 × 5,710.29
  4. Step 4: Simplify right side
    12,287.76x = 105,249,495.65
  5. Step 5: Solve for x
    x = 105,249,495.65/12,287.76
  6. Step 6: Final answer
    x = 8,565.39

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.