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Finding the Fourth Proportional to 18,668,712.60, 28,003,068.90 and 16,684,666.20

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Solution

The fourth proportional to 18,668,712.60, 28,003,068.90 and 16,684,666.20 is: 25,026,999.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668,712.60 : 28,003,068.90 = 16,684,666.20 : x
  2. Step 2: Convert to fraction form
    18,668,712.60/28,003,068.90 = 16,684,666.20/x
  3. Step 3: Cross multiply
    18,668,712.60x = 28,003,068.90 × 16,684,666.20
  4. Step 4: Simplify right side
    18,668,712.60x = 467,221,857,172,101.12
  5. Step 5: Solve for x
    x = 467,221,857,172,101.12/18,668,712.60
  6. Step 6: Final answer
    x = 25,026,999.30

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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.