Home / 28,618.10-39,495.29-15,872.55

Finding the Fourth Proportional to 28,618.10, 39,495.29 and 15,872.55

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Solution

The fourth proportional to 28,618.10, 39,495.29 and 15,872.55 is: 21,905.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,618.10 : 39,495.29 = 15,872.55 : x
  2. Step 2: Convert to fraction form
    28,618.10/39,495.29 = 15,872.55/x
  3. Step 3: Cross multiply
    28,618.10x = 39,495.29 × 15,872.55
  4. Step 4: Simplify right side
    28,618.10x = 626,890,885.93
  5. Step 5: Solve for x
    x = 626,890,885.93/28,618.10
  6. Step 6: Final answer
    x = 21,905.40

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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.