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Finding the Fourth Proportional to 30,398.79, 45,597.65 and 9,621.75

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Solution

The fourth proportional to 30,398.79, 45,597.65 and 9,621.75 is: 14,432.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,398.79 : 45,597.65 = 9,621.75 : x
  2. Step 2: Convert to fraction form
    30,398.79/45,597.65 = 9,621.75/x
  3. Step 3: Cross multiply
    30,398.79x = 45,597.65 × 9,621.75
  4. Step 4: Simplify right side
    30,398.79x = 438,729,140.78
  5. Step 5: Solve for x
    x = 438,729,140.78/30,398.79
  6. Step 6: Final answer
    x = 14,432.45

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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.