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Finding the Fourth Proportional to 38,573.40, 53,230.46 and 20,909.40

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Solution

The fourth proportional to 38,573.40, 53,230.46 and 20,909.40 is: 28,854.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,573.40 : 53,230.46 = 20,909.40 : x
  2. Step 2: Convert to fraction form
    38,573.40/53,230.46 = 20,909.40/x
  3. Step 3: Cross multiply
    38,573.40x = 53,230.46 × 20,909.40
  4. Step 4: Simplify right side
    38,573.40x = 1,113,016,980.32
  5. Step 5: Solve for x
    x = 1,113,016,980.32/38,573.40
  6. Step 6: Final answer
    x = 28,854.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.