Home / 20,931.58-28,887.39-11,501.95

Finding the Fourth Proportional to 20,931.58, 28,887.39 and 11,501.95

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Solution

The fourth proportional to 20,931.58, 28,887.39 and 11,501.95 is: 15,873.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.58 : 28,887.39 = 11,501.95 : x
  2. Step 2: Convert to fraction form
    20,931.58/28,887.39 = 11,501.95/x
  3. Step 3: Cross multiply
    20,931.58x = 28,887.39 × 11,501.95
  4. Step 4: Simplify right side
    20,931.58x = 332,261,315.41
  5. Step 5: Solve for x
    x = 332,261,315.41/20,931.58
  6. Step 6: Final answer
    x = 15,873.69

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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.