Home / 13,599.63-20,521.91-13,111.47

Finding the Fourth Proportional to 13,599.63, 20,521.91 and 13,111.47

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Solution

The fourth proportional to 13,599.63, 20,521.91 and 13,111.47 is: 19,785.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,599.63 : 20,521.91 = 13,111.47 : x
  2. Step 2: Convert to fraction form
    13,599.63/20,521.91 = 13,111.47/x
  3. Step 3: Cross multiply
    13,599.63x = 20,521.91 × 13,111.47
  4. Step 4: Simplify right side
    13,599.63x = 269,072,440.09
  5. Step 5: Solve for x
    x = 269,072,440.09/13,599.63
  6. Step 6: Final answer
    x = 19,785.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.