Home / 13,929.19-19,220.49-7,961.24

Finding the Fourth Proportional to 13,929.19, 19,220.49 and 7,961.24

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Solution

The fourth proportional to 13,929.19, 19,220.49 and 7,961.24 is: 10,985.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.19 : 19,220.49 = 7,961.24 : x
  2. Step 2: Convert to fraction form
    13,929.19/19,220.49 = 7,961.24/x
  3. Step 3: Cross multiply
    13,929.19x = 19,220.49 × 7,961.24
  4. Step 4: Simplify right side
    13,929.19x = 153,018,981.86
  5. Step 5: Solve for x
    x = 153,018,981.86/13,929.19
  6. Step 6: Final answer
    x = 10,985.49

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Double scale
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Similar ratio
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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.