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Finding the Fourth Proportional to 31,805.60, 47,708.40 and 18,683.60

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Solution

The fourth proportional to 31,805.60, 47,708.40 and 18,683.60 is: 28,025.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,805.60 : 47,708.40 = 18,683.60 : x
  2. Step 2: Convert to fraction form
    31,805.60/47,708.40 = 18,683.60/x
  3. Step 3: Cross multiply
    31,805.60x = 47,708.40 × 18,683.60
  4. Step 4: Simplify right side
    31,805.60x = 891,364,662.24
  5. Step 5: Solve for x
    x = 891,364,662.24/31,805.60
  6. Step 6: Final answer
    x = 28,025.40

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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.