Home / 12,312.20-18,470.70-4,915.40

Finding the Fourth Proportional to 12,312.20, 18,470.70 and 4,915.40

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Solution

The fourth proportional to 12,312.20, 18,470.70 and 4,915.40 is: 7,374.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,312.20 : 18,470.70 = 4,915.40 : x
  2. Step 2: Convert to fraction form
    12,312.20/18,470.70 = 4,915.40/x
  3. Step 3: Cross multiply
    12,312.20x = 18,470.70 × 4,915.40
  4. Step 4: Simplify right side
    12,312.20x = 90,790,878.78
  5. Step 5: Solve for x
    x = 90,790,878.78/12,312.20
  6. Step 6: Final answer
    x = 7,374.06

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1.5x scale

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.