Home / 20,268.79-27,971.61-11,316.40

Finding the Fourth Proportional to 20,268.79, 27,971.61 and 11,316.40

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Solution

The fourth proportional to 20,268.79, 27,971.61 and 11,316.40 is: 15,617.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,268.79 : 27,971.61 = 11,316.40 : x
  2. Step 2: Convert to fraction form
    20,268.79/27,971.61 = 11,316.40/x
  3. Step 3: Cross multiply
    20,268.79x = 27,971.61 × 11,316.40
  4. Step 4: Simplify right side
    20,268.79x = 316,537,927.40
  5. Step 5: Solve for x
    x = 316,537,927.40/20,268.79
  6. Step 6: Final answer
    x = 15,617.01

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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.