Home / 15,700.42-21,640.56-15,284.92

Finding the Fourth Proportional to 15,700.42, 21,640.56 and 15,284.92

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Solution

The fourth proportional to 15,700.42, 21,640.56 and 15,284.92 is: 21,067.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,700.42 : 21,640.56 = 15,284.92 : x
  2. Step 2: Convert to fraction form
    15,700.42/21,640.56 = 15,284.92/x
  3. Step 3: Cross multiply
    15,700.42x = 21,640.56 × 15,284.92
  4. Step 4: Simplify right side
    15,700.42x = 330,774,228.36
  5. Step 5: Solve for x
    x = 330,774,228.36/15,700.42
  6. Step 6: Final answer
    x = 21,067.86

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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.