Home / 21,335.04-31,980.20-11,961.32

Finding the Fourth Proportional to 21,335.04, 31,980.20 and 11,961.32

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Solution

The fourth proportional to 21,335.04, 31,980.20 and 11,961.32 is: 17,929.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.04 : 31,980.20 = 11,961.32 : x
  2. Step 2: Convert to fraction form
    21,335.04/31,980.20 = 11,961.32/x
  3. Step 3: Cross multiply
    21,335.04x = 31,980.20 × 11,961.32
  4. Step 4: Simplify right side
    21,335.04x = 382,525,405.86
  5. Step 5: Solve for x
    x = 382,525,405.86/21,335.04
  6. Step 6: Final answer
    x = 17,929.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.