Home / 15,929.04-21,976.20-9,639.12

Finding the Fourth Proportional to 15,929.04, 21,976.20 and 9,639.12

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Solution

The fourth proportional to 15,929.04, 21,976.20 and 9,639.12 is: 13,298.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,929.04 : 21,976.20 = 9,639.12 : x
  2. Step 2: Convert to fraction form
    15,929.04/21,976.20 = 9,639.12/x
  3. Step 3: Cross multiply
    15,929.04x = 21,976.20 × 9,639.12
  4. Step 4: Simplify right side
    15,929.04x = 211,831,228.94
  5. Step 5: Solve for x
    x = 211,831,228.94/15,929.04
  6. Step 6: Final answer
    x = 13,298.43

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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.