Home / 22,990.79-31,726.58-12,918.98

Finding the Fourth Proportional to 22,990.79, 31,726.58 and 12,918.98

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Solution

The fourth proportional to 22,990.79, 31,726.58 and 12,918.98 is: 17,827.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,990.79 : 31,726.58 = 12,918.98 : x
  2. Step 2: Convert to fraction form
    22,990.79/31,726.58 = 12,918.98/x
  3. Step 3: Cross multiply
    22,990.79x = 31,726.58 × 12,918.98
  4. Step 4: Simplify right side
    22,990.79x = 409,875,067.21
  5. Step 5: Solve for x
    x = 409,875,067.21/22,990.79
  6. Step 6: Final answer
    x = 17,827.79

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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.