Home / 20,838.03-28,756.53-11,407.20

Finding the Fourth Proportional to 20,838.03, 28,756.53 and 11,407.20

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Solution

The fourth proportional to 20,838.03, 28,756.53 and 11,407.20 is: 15,741.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.03 : 28,756.53 = 11,407.20 : x
  2. Step 2: Convert to fraction form
    20,838.03/28,756.53 = 11,407.20/x
  3. Step 3: Cross multiply
    20,838.03x = 28,756.53 × 11,407.20
  4. Step 4: Simplify right side
    20,838.03x = 328,031,489.02
  5. Step 5: Solve for x
    x = 328,031,489.02/20,838.03
  6. Step 6: Final answer
    x = 15,741.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.