Home / 21,248.15-31,838.93-13,440.47

Finding the Fourth Proportional to 21,248.15, 31,838.93 and 13,440.47

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Solution

The fourth proportional to 21,248.15, 31,838.93 and 13,440.47 is: 20,139.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,248.15 : 31,838.93 = 13,440.47 : x
  2. Step 2: Convert to fraction form
    21,248.15/31,838.93 = 13,440.47/x
  3. Step 3: Cross multiply
    21,248.15x = 31,838.93 × 13,440.47
  4. Step 4: Simplify right side
    21,248.15x = 427,930,116.29
  5. Step 5: Solve for x
    x = 427,930,116.29/21,248.15
  6. Step 6: Final answer
    x = 20,139.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.