Home / 21,386.51-29,510.80-11,825.09

Finding the Fourth Proportional to 21,386.51, 29,510.80 and 11,825.09

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Solution

The fourth proportional to 21,386.51, 29,510.80 and 11,825.09 is: 16,317.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,386.51 : 29,510.80 = 11,825.09 : x
  2. Step 2: Convert to fraction form
    21,386.51/29,510.80 = 11,825.09/x
  3. Step 3: Cross multiply
    21,386.51x = 29,510.80 × 11,825.09
  4. Step 4: Simplify right side
    21,386.51x = 348,967,688.86
  5. Step 5: Solve for x
    x = 348,967,688.86/21,386.51
  6. Step 6: Final answer
    x = 16,317.19

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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.