Home / 21,511.05-29,699.55-15,852.18

Finding the Fourth Proportional to 21,511.05, 29,699.55 and 15,852.18

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Solution

The fourth proportional to 21,511.05, 29,699.55 and 15,852.18 is: 21,886.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.05 : 29,699.55 = 15,852.18 : x
  2. Step 2: Convert to fraction form
    21,511.05/29,699.55 = 15,852.18/x
  3. Step 3: Cross multiply
    21,511.05x = 29,699.55 × 15,852.18
  4. Step 4: Simplify right side
    21,511.05x = 470,802,612.52
  5. Step 5: Solve for x
    x = 470,802,612.52/21,511.05
  6. Step 6: Final answer
    x = 21,886.55

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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.