Home / 10,345.86-15,515.55-5,412.90

Finding the Fourth Proportional to 10,345.86, 15,515.55 and 5,412.90

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Solution

The fourth proportional to 10,345.86, 15,515.55 and 5,412.90 is: 8,117.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,345.86 : 15,515.55 = 5,412.90 : x
  2. Step 2: Convert to fraction form
    10,345.86/15,515.55 = 5,412.90/x
  3. Step 3: Cross multiply
    10,345.86x = 15,515.55 × 5,412.90
  4. Step 4: Simplify right side
    10,345.86x = 83,984,120.60
  5. Step 5: Solve for x
    x = 83,984,120.60/10,345.86
  6. Step 6: Final answer
    x = 8,117.65

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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.