Home / 12,436.80-18,644.40-7,501.20

Finding the Fourth Proportional to 12,436.80, 18,644.40 and 7,501.20

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Solution

The fourth proportional to 12,436.80, 18,644.40 and 7,501.20 is: 11,245.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,436.80 : 18,644.40 = 7,501.20 : x
  2. Step 2: Convert to fraction form
    12,436.80/18,644.40 = 7,501.20/x
  3. Step 3: Cross multiply
    12,436.80x = 18,644.40 × 7,501.20
  4. Step 4: Simplify right side
    12,436.80x = 139,855,373.28
  5. Step 5: Solve for x
    x = 139,855,373.28/12,436.80
  6. Step 6: Final answer
    x = 11,245.29

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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.