Home / 20,268.89-27,971.52-12,715.53

Finding the Fourth Proportional to 20,268.89, 27,971.52 and 12,715.53

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Solution

The fourth proportional to 20,268.89, 27,971.52 and 12,715.53 is: 17,547.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,268.89 : 27,971.52 = 12,715.53 : x
  2. Step 2: Convert to fraction form
    20,268.89/27,971.52 = 12,715.53/x
  3. Step 3: Cross multiply
    20,268.89x = 27,971.52 × 12,715.53
  4. Step 4: Simplify right side
    20,268.89x = 355,672,701.71
  5. Step 5: Solve for x
    x = 355,672,701.71/20,268.89
  6. Step 6: Final answer
    x = 17,547.72

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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.