Home / 21,864.39-30,180.65-12,911.93

Finding the Fourth Proportional to 21,864.39, 30,180.65 and 12,911.93

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Solution

The fourth proportional to 21,864.39, 30,180.65 and 12,911.93 is: 17,823.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,864.39 : 30,180.65 = 12,911.93 : x
  2. Step 2: Convert to fraction form
    21,864.39/30,180.65 = 12,911.93/x
  3. Step 3: Cross multiply
    21,864.39x = 30,180.65 × 12,911.93
  4. Step 4: Simplify right side
    21,864.39x = 389,690,386.29
  5. Step 5: Solve for x
    x = 389,690,386.29/21,864.39
  6. Step 6: Final answer
    x = 17,823.06

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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.