Home / 13,347.65-20,021.27-3,987.70

Finding the Fourth Proportional to 13,347.65, 20,021.27 and 3,987.70

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Solution

The fourth proportional to 13,347.65, 20,021.27 and 3,987.70 is: 5,981.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347.65 : 20,021.27 = 3,987.70 : x
  2. Step 2: Convert to fraction form
    13,347.65/20,021.27 = 3,987.70/x
  3. Step 3: Cross multiply
    13,347.65x = 20,021.27 × 3,987.70
  4. Step 4: Simplify right side
    13,347.65x = 79,838,748.39
  5. Step 5: Solve for x
    x = 79,838,748.39/13,347.65
  6. Step 6: Final answer
    x = 5,981.48

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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.