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Finding the Fourth Proportional to 18,700.84, 25,809.64 and 11,895.49

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Solution

The fourth proportional to 18,700.84, 25,809.64 and 11,895.49 is: 16,417.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.84 : 25,809.64 = 11,895.49 : x
  2. Step 2: Convert to fraction form
    18,700.84/25,809.64 = 11,895.49/x
  3. Step 3: Cross multiply
    18,700.84x = 25,809.64 × 11,895.49
  4. Step 4: Simplify right side
    18,700.84x = 307,018,317.05
  5. Step 5: Solve for x
    x = 307,018,317.05/18,700.84
  6. Step 6: Final answer
    x = 16,417.35

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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.