Home / 15,785.11-21,784.65-15,294.35

Finding the Fourth Proportional to 15,785.11, 21,784.65 and 15,294.35

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Solution

The fourth proportional to 15,785.11, 21,784.65 and 15,294.35 is: 21,107.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,785.11 : 21,784.65 = 15,294.35 : x
  2. Step 2: Convert to fraction form
    15,785.11/21,784.65 = 15,294.35/x
  3. Step 3: Cross multiply
    15,785.11x = 21,784.65 × 15,294.35
  4. Step 4: Simplify right side
    15,785.11x = 333,182,058.84
  5. Step 5: Solve for x
    x = 333,182,058.84/15,785.11
  6. Step 6: Final answer
    x = 21,107.36

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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.