Home / 21,112.59-29,135.32-11,681.13

Finding the Fourth Proportional to 21,112.59, 29,135.32 and 11,681.13

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Solution

The fourth proportional to 21,112.59, 29,135.32 and 11,681.13 is: 16,119.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.59 : 29,135.32 = 11,681.13 : x
  2. Step 2: Convert to fraction form
    21,112.59/29,135.32 = 11,681.13/x
  3. Step 3: Cross multiply
    21,112.59x = 29,135.32 × 11,681.13
  4. Step 4: Simplify right side
    21,112.59x = 340,333,460.51
  5. Step 5: Solve for x
    x = 340,333,460.51/21,112.59
  6. Step 6: Final answer
    x = 16,119.93

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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.