Home / 18,905.12-26,085.84-10,520

Finding the Fourth Proportional to 18,905.12, 26,085.84 and 10,520

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Solution

The fourth proportional to 18,905.12, 26,085.84 and 10,520 is: 14,515.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.12 : 26,085.84 = 10,520 : x
  2. Step 2: Convert to fraction form
    18,905.12/26,085.84 = 10,520/x
  3. Step 3: Cross multiply
    18,905.12x = 26,085.84 × 10,520
  4. Step 4: Simplify right side
    18,905.12x = 274,423,036.80
  5. Step 5: Solve for x
    x = 274,423,036.80/18,905.12
  6. Step 6: Final answer
    x = 14,515.81

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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.