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Finding the Fourth Proportional to 16,897.40, 25,309.65 and 13,981.40

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Solution

The fourth proportional to 16,897.40, 25,309.65 and 13,981.40 is: 20,941.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,897.40 : 25,309.65 = 13,981.40 : x
  2. Step 2: Convert to fraction form
    16,897.40/25,309.65 = 13,981.40/x
  3. Step 3: Cross multiply
    16,897.40x = 25,309.65 × 13,981.40
  4. Step 4: Simplify right side
    16,897.40x = 353,864,340.51
  5. Step 5: Solve for x
    x = 353,864,340.51/16,897.40
  6. Step 6: Final answer
    x = 20,941.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.