Home / 15,398.20-21,241.95-9,730.21

Finding the Fourth Proportional to 15,398.20, 21,241.95 and 9,730.21

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Solution

The fourth proportional to 15,398.20, 21,241.95 and 9,730.21 is: 13,422.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,398.20 : 21,241.95 = 9,730.21 : x
  2. Step 2: Convert to fraction form
    15,398.20/21,241.95 = 9,730.21/x
  3. Step 3: Cross multiply
    15,398.20x = 21,241.95 × 9,730.21
  4. Step 4: Simplify right side
    15,398.20x = 206,688,634.31
  5. Step 5: Solve for x
    x = 206,688,634.31/15,398.20
  6. Step 6: Final answer
    x = 13,422.91

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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.