Home / 28,631.90-39,511.23-15,885.02

Finding the Fourth Proportional to 28,631.90, 39,511.23 and 15,885.02

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Solution

The fourth proportional to 28,631.90, 39,511.23 and 15,885.02 is: 21,920.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,631.90 : 39,511.23 = 15,885.02 : x
  2. Step 2: Convert to fraction form
    28,631.90/39,511.23 = 15,885.02/x
  3. Step 3: Cross multiply
    28,631.90x = 39,511.23 × 15,885.02
  4. Step 4: Simplify right side
    28,631.90x = 627,636,717.98
  5. Step 5: Solve for x
    x = 627,636,717.98/28,631.90
  6. Step 6: Final answer
    x = 21,920.89

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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.