Home / 13,726.04-18,934.95-8,681.78

Finding the Fourth Proportional to 13,726.04, 18,934.95 and 8,681.78

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Solution

The fourth proportional to 13,726.04, 18,934.95 and 8,681.78 is: 11,976.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,726.04 : 18,934.95 = 8,681.78 : x
  2. Step 2: Convert to fraction form
    13,726.04/18,934.95 = 8,681.78/x
  3. Step 3: Cross multiply
    13,726.04x = 18,934.95 × 8,681.78
  4. Step 4: Simplify right side
    13,726.04x = 164,389,070.21
  5. Step 5: Solve for x
    x = 164,389,070.21/13,726.04
  6. Step 6: Final answer
    x = 11,976.44

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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.