Home / 21,386.19-29,513.60-11,955.15

Finding the Fourth Proportional to 21,386.19, 29,513.60 and 11,955.15

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Solution

The fourth proportional to 21,386.19, 29,513.60 and 11,955.15 is: 16,498.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,386.19 : 29,513.60 = 11,955.15 : x
  2. Step 2: Convert to fraction form
    21,386.19/29,513.60 = 11,955.15/x
  3. Step 3: Cross multiply
    21,386.19x = 29,513.60 × 11,955.15
  4. Step 4: Simplify right side
    21,386.19x = 352,839,455.26
  5. Step 5: Solve for x
    x = 352,839,455.26/21,386.19
  6. Step 6: Final answer
    x = 16,498.47

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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.