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Finding the Fourth Proportional to 20,606,606.60, 30,909,909.90 and 18,087,182.60

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Solution

The fourth proportional to 20,606,606.60, 30,909,909.90 and 18,087,182.60 is: 27,130,773.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,606,606.60 : 30,909,909.90 = 18,087,182.60 : x
  2. Step 2: Convert to fraction form
    20,606,606.60/30,909,909.90 = 18,087,182.60/x
  3. Step 3: Cross multiply
    20,606,606.60x = 30,909,909.90 × 18,087,182.60
  4. Step 4: Simplify right side
    20,606,606.60x = 559,073,184,510,847.75
  5. Step 5: Solve for x
    x = 559,073,184,510,847.75/20,606,606.60
  6. Step 6: Final answer
    x = 27,130,773.90

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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.