Home / 19,920.12-27,486.66-11,535

Finding the Fourth Proportional to 19,920.12, 27,486.66 and 11,535

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Solution

The fourth proportional to 19,920.12, 27,486.66 and 11,535 is: 15,916.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.12 : 27,486.66 = 11,535 : x
  2. Step 2: Convert to fraction form
    19,920.12/27,486.66 = 11,535/x
  3. Step 3: Cross multiply
    19,920.12x = 27,486.66 × 11,535
  4. Step 4: Simplify right side
    19,920.12x = 317,058,623.10
  5. Step 5: Solve for x
    x = 317,058,623.10/19,920.12
  6. Step 6: Final answer
    x = 15,916.50

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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.