Home / 20,811.93-28,719.02-13,146.27

Finding the Fourth Proportional to 20,811.93, 28,719.02 and 13,146.27

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Solution

The fourth proportional to 20,811.93, 28,719.02 and 13,146.27 is: 18,140.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.93 : 28,719.02 = 13,146.27 : x
  2. Step 2: Convert to fraction form
    20,811.93/28,719.02 = 13,146.27/x
  3. Step 3: Cross multiply
    20,811.93x = 28,719.02 × 13,146.27
  4. Step 4: Simplify right side
    20,811.93x = 377,547,925.32
  5. Step 5: Solve for x
    x = 377,547,925.32/20,811.93
  6. Step 6: Final answer
    x = 18,140.94

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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.