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Finding the Fourth Proportional to 28,250.30, 38,985.30 and 15,503.68

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Solution

The fourth proportional to 28,250.30, 38,985.30 and 15,503.68 is: 21,395.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,250.30 : 38,985.30 = 15,503.68 : x
  2. Step 2: Convert to fraction form
    28,250.30/38,985.30 = 15,503.68/x
  3. Step 3: Cross multiply
    28,250.30x = 38,985.30 × 15,503.68
  4. Step 4: Simplify right side
    28,250.30x = 604,415,615.90
  5. Step 5: Solve for x
    x = 604,415,615.90/28,250.30
  6. Step 6: Final answer
    x = 21,395.02

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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.