Home / 20,315.50-28,041.40-11,821.46

Finding the Fourth Proportional to 20,315.50, 28,041.40 and 11,821.46

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Solution

The fourth proportional to 20,315.50, 28,041.40 and 11,821.46 is: 16,317.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.50 : 28,041.40 = 11,821.46 : x
  2. Step 2: Convert to fraction form
    20,315.50/28,041.40 = 11,821.46/x
  3. Step 3: Cross multiply
    20,315.50x = 28,041.40 × 11,821.46
  4. Step 4: Simplify right side
    20,315.50x = 331,490,148.24
  5. Step 5: Solve for x
    x = 331,490,148.24/20,315.50
  6. Step 6: Final answer
    x = 16,317.11

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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.