Home / 28,188-38,899.44-15,615.18

Finding the Fourth Proportional to 28,188, 38,899.44 and 15,615.18

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Solution

The fourth proportional to 28,188, 38,899.44 and 15,615.18 is: 21,548.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188 : 38,899.44 = 15,615.18 : x
  2. Step 2: Convert to fraction form
    28,188/38,899.44 = 15,615.18/x
  3. Step 3: Cross multiply
    28,188x = 38,899.44 × 15,615.18
  4. Step 4: Simplify right side
    28,188x = 607,421,757.50
  5. Step 5: Solve for x
    x = 607,421,757.50/28,188
  6. Step 6: Final answer
    x = 21,548.95

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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.