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Finding the Fourth Proportional to 30,112.56, 45,158.76 and 10,390.56

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Solution

The fourth proportional to 30,112.56, 45,158.76 and 10,390.56 is: 15,582.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,112.56 : 45,158.76 = 10,390.56 : x
  2. Step 2: Convert to fraction form
    30,112.56/45,158.76 = 10,390.56/x
  3. Step 3: Cross multiply
    30,112.56x = 45,158.76 × 10,390.56
  4. Step 4: Simplify right side
    30,112.56x = 469,224,805.31
  5. Step 5: Solve for x
    x = 469,224,805.31/30,112.56
  6. Step 6: Final answer
    x = 15,582.36

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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.