Home / 21,179.18-29,210.94-15,511.89

Finding the Fourth Proportional to 21,179.18, 29,210.94 and 15,511.89

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Solution

The fourth proportional to 21,179.18, 29,210.94 and 15,511.89 is: 21,394.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.18 : 29,210.94 = 15,511.89 : x
  2. Step 2: Convert to fraction form
    21,179.18/29,210.94 = 15,511.89/x
  3. Step 3: Cross multiply
    21,179.18x = 29,210.94 × 15,511.89
  4. Step 4: Simplify right side
    21,179.18x = 453,116,888.08
  5. Step 5: Solve for x
    x = 453,116,888.08/21,179.18
  6. Step 6: Final answer
    x = 21,394.45

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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.