Home / 18,718.90-28,077.44-11,603.86

Finding the Fourth Proportional to 18,718.90, 28,077.44 and 11,603.86

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Solution

The fourth proportional to 18,718.90, 28,077.44 and 11,603.86 is: 17,405.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.90 : 28,077.44 = 11,603.86 : x
  2. Step 2: Convert to fraction form
    18,718.90/28,077.44 = 11,603.86/x
  3. Step 3: Cross multiply
    18,718.90x = 28,077.44 × 11,603.86
  4. Step 4: Simplify right side
    18,718.90x = 325,806,554.71
  5. Step 5: Solve for x
    x = 325,806,554.71/18,718.90
  6. Step 6: Final answer
    x = 17,405.22

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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.