Home / 21,631.73-29,807.49-15,957.51

Finding the Fourth Proportional to 21,631.73, 29,807.49 and 15,957.51

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Solution

The fourth proportional to 21,631.73, 29,807.49 and 15,957.51 is: 21,988.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,631.73 : 29,807.49 = 15,957.51 : x
  2. Step 2: Convert to fraction form
    21,631.73/29,807.49 = 15,957.51/x
  3. Step 3: Cross multiply
    21,631.73x = 29,807.49 × 15,957.51
  4. Step 4: Simplify right side
    21,631.73x = 475,653,267.81
  5. Step 5: Solve for x
    x = 475,653,267.81/21,631.73
  6. Step 6: Final answer
    x = 21,988.69

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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.