Home / 21,357.16-29,486.73-19,115.15

Finding the Fourth Proportional to 21,357.16, 29,486.73 and 19,115.15

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Solution

The fourth proportional to 21,357.16, 29,486.73 and 19,115.15 is: 26,391.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,357.16 : 29,486.73 = 19,115.15 : x
  2. Step 2: Convert to fraction form
    21,357.16/29,486.73 = 19,115.15/x
  3. Step 3: Cross multiply
    21,357.16x = 29,486.73 × 19,115.15
  4. Step 4: Simplify right side
    21,357.16x = 563,643,191.21
  5. Step 5: Solve for x
    x = 563,643,191.21/21,357.16
  6. Step 6: Final answer
    x = 26,391.30

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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.