Home / 20,785,538.70-31,178,308.05-18,659,774.70

Finding the Fourth Proportional to 20,785,538.70, 31,178,308.05 and 18,659,774.70

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Solution

The fourth proportional to 20,785,538.70, 31,178,308.05 and 18,659,774.70 is: 27,989,662.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785,538.70 : 31,178,308.05 = 18,659,774.70 : x
  2. Step 2: Convert to fraction form
    20,785,538.70/31,178,308.05 = 18,659,774.70/x
  3. Step 3: Cross multiply
    20,785,538.70x = 31,178,308.05 × 18,659,774.70
  4. Step 4: Simplify right side
    20,785,538.70x = 581,780,203,740,196.38
  5. Step 5: Solve for x
    x = 581,780,203,740,196.38/20,785,538.70
  6. Step 6: Final answer
    x = 27,989,662.05

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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.