Home / 20,520,448.40-28,315,729.50-11,821,437.20

Finding the Fourth Proportional to 20,520,448.40, 28,315,729.50 and 11,821,437.20

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Solution

The fourth proportional to 20,520,448.40, 28,315,729.50 and 11,821,437.20 is: 16,312,149.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520,448.40 : 28,315,729.50 = 11,821,437.20 : x
  2. Step 2: Convert to fraction form
    20,520,448.40/28,315,729.50 = 11,821,437.20/x
  3. Step 3: Cross multiply
    20,520,448.40x = 28,315,729.50 × 11,821,437.20
  4. Step 4: Simplify right side
    20,520,448.40x = 334,732,618,056,437.38
  5. Step 5: Solve for x
    x = 334,732,618,056,437.38/20,520,448.40
  6. Step 6: Final answer
    x = 16,312,149.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.