Home / 15,857.10-21,838.41-15,512.72

Finding the Fourth Proportional to 15,857.10, 21,838.41 and 15,512.72

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Solution

The fourth proportional to 15,857.10, 21,838.41 and 15,512.72 is: 21,364.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.10 : 21,838.41 = 15,512.72 : x
  2. Step 2: Convert to fraction form
    15,857.10/21,838.41 = 15,512.72/x
  3. Step 3: Cross multiply
    15,857.10x = 21,838.41 × 15,512.72
  4. Step 4: Simplify right side
    15,857.10x = 338,773,030.38
  5. Step 5: Solve for x
    x = 338,773,030.38/15,857.10
  6. Step 6: Final answer
    x = 21,364.12

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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.