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Finding the Fourth Proportional to 28,695.67, 39,599.74 and 15,948.88

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Solution

The fourth proportional to 28,695.67, 39,599.74 and 15,948.88 is: 22,009.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,695.67 : 39,599.74 = 15,948.88 : x
  2. Step 2: Convert to fraction form
    28,695.67/39,599.74 = 15,948.88/x
  3. Step 3: Cross multiply
    28,695.67x = 39,599.74 × 15,948.88
  4. Step 4: Simplify right side
    28,695.67x = 631,571,501.29
  5. Step 5: Solve for x
    x = 631,571,501.29/28,695.67
  6. Step 6: Final answer
    x = 22,009.30

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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.