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Finding the Fourth Proportional to 18,684,649.60, 28,026,974.40 and 15,661,340.80

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Solution

The fourth proportional to 18,684,649.60, 28,026,974.40 and 15,661,340.80 is: 23,492,011.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,684,649.60 : 28,026,974.40 = 15,661,340.80 : x
  2. Step 2: Convert to fraction form
    18,684,649.60/28,026,974.40 = 15,661,340.80/x
  3. Step 3: Cross multiply
    18,684,649.60x = 28,026,974.40 × 15,661,340.80
  4. Step 4: Simplify right side
    18,684,649.60x = 438,939,997,671,275.50
  5. Step 5: Solve for x
    x = 438,939,997,671,275.50/18,684,649.60
  6. Step 6: Final answer
    x = 23,492,011.20

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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.