Home / 14,212.80-21,319.20-7,642.08

Finding the Fourth Proportional to 14,212.80, 21,319.20 and 7,642.08

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Solution

The fourth proportional to 14,212.80, 21,319.20 and 7,642.08 is: 11,463.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,212.80 : 21,319.20 = 7,642.08 : x
  2. Step 2: Convert to fraction form
    14,212.80/21,319.20 = 7,642.08/x
  3. Step 3: Cross multiply
    14,212.80x = 21,319.20 × 7,642.08
  4. Step 4: Simplify right side
    14,212.80x = 162,923,031.94
  5. Step 5: Solve for x
    x = 162,923,031.94/14,212.80
  6. Step 6: Final answer
    x = 11,463.12

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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.