Home / 12,539.40-18,809.10-4,221.52

Finding the Fourth Proportional to 12,539.40, 18,809.10 and 4,221.52

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Solution

The fourth proportional to 12,539.40, 18,809.10 and 4,221.52 is: 6,332.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,539.40 : 18,809.10 = 4,221.52 : x
  2. Step 2: Convert to fraction form
    12,539.40/18,809.10 = 4,221.52/x
  3. Step 3: Cross multiply
    12,539.40x = 18,809.10 × 4,221.52
  4. Step 4: Simplify right side
    12,539.40x = 79,402,991.83
  5. Step 5: Solve for x
    x = 79,402,991.83/12,539.40
  6. Step 6: Final answer
    x = 6,332.28

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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.