Home / 10,865.81-16,302.15-5,319.74

Finding the Fourth Proportional to 10,865.81, 16,302.15 and 5,319.74

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Solution

The fourth proportional to 10,865.81, 16,302.15 and 5,319.74 is: 7,981.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,865.81 : 16,302.15 = 5,319.74 : x
  2. Step 2: Convert to fraction form
    10,865.81/16,302.15 = 5,319.74/x
  3. Step 3: Cross multiply
    10,865.81x = 16,302.15 × 5,319.74
  4. Step 4: Simplify right side
    10,865.81x = 86,723,117.93
  5. Step 5: Solve for x
    x = 86,723,117.93/10,865.81
  6. Step 6: Final answer
    x = 7,981.29

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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.