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Finding the Fourth Proportional to 48,421.40, 72,657.90 and 18,840.20

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Solution

The fourth proportional to 48,421.40, 72,657.90 and 18,840.20 is: 28,270.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,421.40 : 72,657.90 = 18,840.20 : x
  2. Step 2: Convert to fraction form
    48,421.40/72,657.90 = 18,840.20/x
  3. Step 3: Cross multiply
    48,421.40x = 72,657.90 × 18,840.20
  4. Step 4: Simplify right side
    48,421.40x = 1,368,889,367.58
  5. Step 5: Solve for x
    x = 1,368,889,367.58/48,421.40
  6. Step 6: Final answer
    x = 28,270.34

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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.