Home / 12,457,870.80-18,686,806.20-12,289,909.20

Finding the Fourth Proportional to 12,457,870.80, 18,686,806.20 and 12,289,909.20

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Solution

The fourth proportional to 12,457,870.80, 18,686,806.20 and 12,289,909.20 is: 18,434,863.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457,870.80 : 18,686,806.20 = 12,289,909.20 : x
  2. Step 2: Convert to fraction form
    12,457,870.80/18,686,806.20 = 12,289,909.20/x
  3. Step 3: Cross multiply
    12,457,870.80x = 18,686,806.20 × 12,289,909.20
  4. Step 4: Simplify right side
    12,457,870.80x = 229,659,151,435,997.03
  5. Step 5: Solve for x
    x = 229,659,151,435,997.03/12,457,870.80
  6. Step 6: Final answer
    x = 18,434,863.80

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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.