Home / 12,220.24-18,337.80-4,428.40

Finding the Fourth Proportional to 12,220.24, 18,337.80 and 4,428.40

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Solution

The fourth proportional to 12,220.24, 18,337.80 and 4,428.40 is: 6,645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.24 : 18,337.80 = 4,428.40 : x
  2. Step 2: Convert to fraction form
    12,220.24/18,337.80 = 4,428.40/x
  3. Step 3: Cross multiply
    12,220.24x = 18,337.80 × 4,428.40
  4. Step 4: Simplify right side
    12,220.24x = 81,207,113.52
  5. Step 5: Solve for x
    x = 81,207,113.52/12,220.24
  6. Step 6: Final answer
    x = 6,645.30

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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.