Home / 21,985,979.40-32,978,969.10-18,458,785.80

Finding the Fourth Proportional to 21,985,979.40, 32,978,969.10 and 18,458,785.80

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Solution

The fourth proportional to 21,985,979.40, 32,978,969.10 and 18,458,785.80 is: 27,688,178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985,979.40 : 32,978,969.10 = 18,458,785.80 : x
  2. Step 2: Convert to fraction form
    21,985,979.40/32,978,969.10 = 18,458,785.80/x
  3. Step 3: Cross multiply
    21,985,979.40x = 32,978,969.10 × 18,458,785.80
  4. Step 4: Simplify right side
    21,985,979.40x = 608,751,726,521,718.88
  5. Step 5: Solve for x
    x = 608,751,726,521,718.88/21,985,979.40
  6. Step 6: Final answer
    x = 27,688,178.70

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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.