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Finding the Fourth Proportional to 18,543.90, 25,582.02 and 16,421.60

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Solution

The fourth proportional to 18,543.90, 25,582.02 and 16,421.60 is: 22,654.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,543.90 : 25,582.02 = 16,421.60 : x
  2. Step 2: Convert to fraction form
    18,543.90/25,582.02 = 16,421.60/x
  3. Step 3: Cross multiply
    18,543.90x = 25,582.02 × 16,421.60
  4. Step 4: Simplify right side
    18,543.90x = 420,097,699.63
  5. Step 5: Solve for x
    x = 420,097,699.63/18,543.90
  6. Step 6: Final answer
    x = 22,654.23

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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.