Home / 10,931.75-16,400.40-3,140.57

Finding the Fourth Proportional to 10,931.75, 16,400.40 and 3,140.57

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Solution

The fourth proportional to 10,931.75, 16,400.40 and 3,140.57 is: 4,711.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.75 : 16,400.40 = 3,140.57 : x
  2. Step 2: Convert to fraction form
    10,931.75/16,400.40 = 3,140.57/x
  3. Step 3: Cross multiply
    10,931.75x = 16,400.40 × 3,140.57
  4. Step 4: Simplify right side
    10,931.75x = 51,506,506.52
  5. Step 5: Solve for x
    x = 51,506,506.52/10,931.75
  6. Step 6: Final answer
    x = 4,711.64

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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.