Home / 21,240.32-29,316.48-13,775.36

Finding the Fourth Proportional to 21,240.32, 29,316.48 and 13,775.36

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Solution

The fourth proportional to 21,240.32, 29,316.48 and 13,775.36 is: 19,013.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.32 : 29,316.48 = 13,775.36 : x
  2. Step 2: Convert to fraction form
    21,240.32/29,316.48 = 13,775.36/x
  3. Step 3: Cross multiply
    21,240.32x = 29,316.48 × 13,775.36
  4. Step 4: Simplify right side
    21,240.32x = 403,845,065.93
  5. Step 5: Solve for x
    x = 403,845,065.93/21,240.32
  6. Step 6: Final answer
    x = 19,013.13

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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.