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Finding the Fourth Proportional to 14,555.22, 20,086.20 and 7,931.22

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Solution

The fourth proportional to 14,555.22, 20,086.20 and 7,931.22 is: 10,945.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,555.22 : 20,086.20 = 7,931.22 : x
  2. Step 2: Convert to fraction form
    14,555.22/20,086.20 = 7,931.22/x
  3. Step 3: Cross multiply
    14,555.22x = 20,086.20 × 7,931.22
  4. Step 4: Simplify right side
    14,555.22x = 159,308,071.16
  5. Step 5: Solve for x
    x = 159,308,071.16/14,555.22
  6. Step 6: Final answer
    x = 10,945.08

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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.