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Finding the Fourth Proportional to 28,250.06, 38,985.06 and 15,674.80

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Solution

The fourth proportional to 28,250.06, 38,985.06 and 15,674.80 is: 21,631.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,250.06 : 38,985.06 = 15,674.80 : x
  2. Step 2: Convert to fraction form
    28,250.06/38,985.06 = 15,674.80/x
  3. Step 3: Cross multiply
    28,250.06x = 38,985.06 × 15,674.80
  4. Step 4: Simplify right side
    28,250.06x = 611,083,018.49
  5. Step 5: Solve for x
    x = 611,083,018.49/28,250.06
  6. Step 6: Final answer
    x = 21,631.21

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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.