Home / 15,411.36-21,309.14-13,443.06

Finding the Fourth Proportional to 15,411.36, 21,309.14 and 13,443.06

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Solution

The fourth proportional to 15,411.36, 21,309.14 and 13,443.06 is: 18,587.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,411.36 : 21,309.14 = 13,443.06 : x
  2. Step 2: Convert to fraction form
    15,411.36/21,309.14 = 13,443.06/x
  3. Step 3: Cross multiply
    15,411.36x = 21,309.14 × 13,443.06
  4. Step 4: Simplify right side
    15,411.36x = 286,460,047.57
  5. Step 5: Solve for x
    x = 286,460,047.57/15,411.36
  6. Step 6: Final answer
    x = 18,587.59

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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.