Home / 21,631.63-29,807.32-15,957.38

Finding the Fourth Proportional to 21,631.63, 29,807.32 and 15,957.38

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Solution

The fourth proportional to 21,631.63, 29,807.32 and 15,957.38 is: 21,988.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,631.63 : 29,807.32 = 15,957.38 : x
  2. Step 2: Convert to fraction form
    21,631.63/29,807.32 = 15,957.38/x
  3. Step 3: Cross multiply
    21,631.63x = 29,807.32 × 15,957.38
  4. Step 4: Simplify right side
    21,631.63x = 475,646,667.85
  5. Step 5: Solve for x
    x = 475,646,667.85/21,631.63
  6. Step 6: Final answer
    x = 21,988.48

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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.