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Finding the Fourth Proportional to 20,303.76, 30,455.65 and 10,948.18

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Solution

The fourth proportional to 20,303.76, 30,455.65 and 10,948.18 is: 16,422.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,303.76 : 30,455.65 = 10,948.18 : x
  2. Step 2: Convert to fraction form
    20,303.76/30,455.65 = 10,948.18/x
  3. Step 3: Cross multiply
    20,303.76x = 30,455.65 × 10,948.18
  4. Step 4: Simplify right side
    20,303.76x = 333,433,938.22
  5. Step 5: Solve for x
    x = 333,433,938.22/20,303.76
  6. Step 6: Final answer
    x = 16,422.28

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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.