Home / 18,688,006.40-28,032,009.60-6,719,187.20

Finding the Fourth Proportional to 18,688,006.40, 28,032,009.60 and 6,719,187.20

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Solution

The fourth proportional to 18,688,006.40, 28,032,009.60 and 6,719,187.20 is: 10,078,780.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688,006.40 : 28,032,009.60 = 6,719,187.20 : x
  2. Step 2: Convert to fraction form
    18,688,006.40/28,032,009.60 = 6,719,187.20/x
  3. Step 3: Cross multiply
    18,688,006.40x = 28,032,009.60 × 6,719,187.20
  4. Step 4: Simplify right side
    18,688,006.40x = 188,352,320,094,597.12
  5. Step 5: Solve for x
    x = 188,352,320,094,597.12/18,688,006.40
  6. Step 6: Final answer
    x = 10,078,780.80

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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.