Home / 8,931.57-12,311.36-7,040.08

Finding the Fourth Proportional to 8,931.57, 12,311.36 and 7,040.08

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Solution

The fourth proportional to 8,931.57, 12,311.36 and 7,040.08 is: 9,704.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,931.57 : 12,311.36 = 7,040.08 : x
  2. Step 2: Convert to fraction form
    8,931.57/12,311.36 = 7,040.08/x
  3. Step 3: Cross multiply
    8,931.57x = 12,311.36 × 7,040.08
  4. Step 4: Simplify right side
    8,931.57x = 86,672,924.11
  5. Step 5: Solve for x
    x = 86,672,924.11/8,931.57
  6. Step 6: Final answer
    x = 9,704.11

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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.