Home / 12,492.40-18,738.60-10,815.70

Finding the Fourth Proportional to 12,492.40, 18,738.60 and 10,815.70

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Solution

The fourth proportional to 12,492.40, 18,738.60 and 10,815.70 is: 16,223.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,492.40 : 18,738.60 = 10,815.70 : x
  2. Step 2: Convert to fraction form
    12,492.40/18,738.60 = 10,815.70/x
  3. Step 3: Cross multiply
    12,492.40x = 18,738.60 × 10,815.70
  4. Step 4: Simplify right side
    12,492.40x = 202,671,076.02
  5. Step 5: Solve for x
    x = 202,671,076.02/12,492.40
  6. Step 6: Final answer
    x = 16,223.55

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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.