Home / 14,989.50-20,666.28-12,290.78

Finding the Fourth Proportional to 14,989.50, 20,666.28 and 12,290.78

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Solution

The fourth proportional to 14,989.50, 20,666.28 and 12,290.78 is: 16,945.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,989.50 : 20,666.28 = 12,290.78 : x
  2. Step 2: Convert to fraction form
    14,989.50/20,666.28 = 12,290.78/x
  3. Step 3: Cross multiply
    14,989.50x = 20,666.28 × 12,290.78
  4. Step 4: Simplify right side
    14,989.50x = 254,004,597.57
  5. Step 5: Solve for x
    x = 254,004,597.57/14,989.50
  6. Step 6: Final answer
    x = 16,945.50

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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.