Home / 21,298.10-29,386.13-13,228.07

Finding the Fourth Proportional to 21,298.10, 29,386.13 and 13,228.07

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Solution

The fourth proportional to 21,298.10, 29,386.13 and 13,228.07 is: 18,251.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298.10 : 29,386.13 = 13,228.07 : x
  2. Step 2: Convert to fraction form
    21,298.10/29,386.13 = 13,228.07/x
  3. Step 3: Cross multiply
    21,298.10x = 29,386.13 × 13,228.07
  4. Step 4: Simplify right side
    21,298.10x = 388,721,571.60
  5. Step 5: Solve for x
    x = 388,721,571.60/21,298.10
  6. Step 6: Final answer
    x = 18,251.47

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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.