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Finding the Fourth Proportional to 18,356.77, 25,332.88 and 12,988.82

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Solution

The fourth proportional to 18,356.77, 25,332.88 and 12,988.82 is: 17,924.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,356.77 : 25,332.88 = 12,988.82 : x
  2. Step 2: Convert to fraction form
    18,356.77/25,332.88 = 12,988.82/x
  3. Step 3: Cross multiply
    18,356.77x = 25,332.88 × 12,988.82
  4. Step 4: Simplify right side
    18,356.77x = 329,044,153.46
  5. Step 5: Solve for x
    x = 329,044,153.46/18,356.77
  6. Step 6: Final answer
    x = 17,924.95

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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.