Home / 20,315.99-28,037.40-11,365.04

Finding the Fourth Proportional to 20,315.99, 28,037.40 and 11,365.04

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Solution

The fourth proportional to 20,315.99, 28,037.40 and 11,365.04 is: 15,684.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.99 : 28,037.40 = 11,365.04 : x
  2. Step 2: Convert to fraction form
    20,315.99/28,037.40 = 11,365.04/x
  3. Step 3: Cross multiply
    20,315.99x = 28,037.40 × 11,365.04
  4. Step 4: Simplify right side
    20,315.99x = 318,646,172.50
  5. Step 5: Solve for x
    x = 318,646,172.50/20,315.99
  6. Step 6: Final answer
    x = 15,684.50

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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.