Home / 20,330.34-28,055.76-11,378.22

Finding the Fourth Proportional to 20,330.34, 28,055.76 and 11,378.22

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Solution

The fourth proportional to 20,330.34, 28,055.76 and 11,378.22 is: 15,701.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.34 : 28,055.76 = 11,378.22 : x
  2. Step 2: Convert to fraction form
    20,330.34/28,055.76 = 11,378.22/x
  3. Step 3: Cross multiply
    20,330.34x = 28,055.76 × 11,378.22
  4. Step 4: Simplify right side
    20,330.34x = 319,224,609.55
  5. Step 5: Solve for x
    x = 319,224,609.55/20,330.34
  6. Step 6: Final answer
    x = 15,701.88

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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.