Home / 12,417.20-18,640.20-7,492.40

Finding the Fourth Proportional to 12,417.20, 18,640.20 and 7,492.40

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Solution

The fourth proportional to 12,417.20, 18,640.20 and 7,492.40 is: 11,247.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,417.20 : 18,640.20 = 7,492.40 : x
  2. Step 2: Convert to fraction form
    12,417.20/18,640.20 = 7,492.40/x
  3. Step 3: Cross multiply
    12,417.20x = 18,640.20 × 7,492.40
  4. Step 4: Simplify right side
    12,417.20x = 139,659,834.48
  5. Step 5: Solve for x
    x = 139,659,834.48/12,417.20
  6. Step 6: Final answer
    x = 11,247.29

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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.