Home / 10,931.80-16,389.60-4,686.70

Finding the Fourth Proportional to 10,931.80, 16,389.60 and 4,686.70

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Solution

The fourth proportional to 10,931.80, 16,389.60 and 4,686.70 is: 7,026.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.80 : 16,389.60 = 4,686.70 : x
  2. Step 2: Convert to fraction form
    10,931.80/16,389.60 = 4,686.70/x
  3. Step 3: Cross multiply
    10,931.80x = 16,389.60 × 4,686.70
  4. Step 4: Simplify right side
    10,931.80x = 76,813,138.32
  5. Step 5: Solve for x
    x = 76,813,138.32/10,931.80
  6. Step 6: Final answer
    x = 7,026.58

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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.