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Finding the Fourth Proportional to 30,585.28, 45,869.60 and 8,393.40

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Solution

The fourth proportional to 30,585.28, 45,869.60 and 8,393.40 is: 12,587.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,585.28 : 45,869.60 = 8,393.40 : x
  2. Step 2: Convert to fraction form
    30,585.28/45,869.60 = 8,393.40/x
  3. Step 3: Cross multiply
    30,585.28x = 45,869.60 × 8,393.40
  4. Step 4: Simplify right side
    30,585.28x = 385,001,900.64
  5. Step 5: Solve for x
    x = 385,001,900.64/30,585.28
  6. Step 6: Final answer
    x = 12,587.82

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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.