Home / 15,939.54-21,990.69-9,649.62

Finding the Fourth Proportional to 15,939.54, 21,990.69 and 9,649.62

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Solution

The fourth proportional to 15,939.54, 21,990.69 and 9,649.62 is: 13,312.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,939.54 : 21,990.69 = 9,649.62 : x
  2. Step 2: Convert to fraction form
    15,939.54/21,990.69 = 9,649.62/x
  3. Step 3: Cross multiply
    15,939.54x = 21,990.69 × 9,649.62
  4. Step 4: Simplify right side
    15,939.54x = 212,201,802.04
  5. Step 5: Solve for x
    x = 212,201,802.04/15,939.54
  6. Step 6: Final answer
    x = 13,312.92

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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.