Home / 20,139,870.80-30,138,947.40-18,439,259.60

Finding the Fourth Proportional to 20,139,870.80, 30,138,947.40 and 18,439,259.60

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Solution

The fourth proportional to 20,139,870.80, 30,138,947.40 and 18,439,259.60 is: 27,594,013.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139,870.80 : 30,138,947.40 = 18,439,259.60 : x
  2. Step 2: Convert to fraction form
    20,139,870.80/30,138,947.40 = 18,439,259.60/x
  3. Step 3: Cross multiply
    20,139,870.80x = 30,138,947.40 × 18,439,259.60
  4. Step 4: Simplify right side
    20,139,870.80x = 555,739,875,179,345.06
  5. Step 5: Solve for x
    x = 555,739,875,179,345.06/20,139,870.80
  6. Step 6: Final answer
    x = 27,594,013.92

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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.