Home / 20,315.34-28,034.55-11,363.58

Finding the Fourth Proportional to 20,315.34, 28,034.55 and 11,363.58

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Solution

The fourth proportional to 20,315.34, 28,034.55 and 11,363.58 is: 15,681.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.34 : 28,034.55 = 11,363.58 : x
  2. Step 2: Convert to fraction form
    20,315.34/28,034.55 = 11,363.58/x
  3. Step 3: Cross multiply
    20,315.34x = 28,034.55 × 11,363.58
  4. Step 4: Simplify right side
    20,315.34x = 318,572,851.69
  5. Step 5: Solve for x
    x = 318,572,851.69/20,315.34
  6. Step 6: Final answer
    x = 15,681.39

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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.