Home / 18,721.10-28,081.59-7,625.18

Finding the Fourth Proportional to 18,721.10, 28,081.59 and 7,625.18

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Solution

The fourth proportional to 18,721.10, 28,081.59 and 7,625.18 is: 11,437.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.10 : 28,081.59 = 7,625.18 : x
  2. Step 2: Convert to fraction form
    18,721.10/28,081.59 = 7,625.18/x
  3. Step 3: Cross multiply
    18,721.10x = 28,081.59 × 7,625.18
  4. Step 4: Simplify right side
    18,721.10x = 214,127,038.03
  5. Step 5: Solve for x
    x = 214,127,038.03/18,721.10
  6. Step 6: Final answer
    x = 11,437.74

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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.