Home / 21,291.95-31,905.06-13,484.36

Finding the Fourth Proportional to 21,291.95, 31,905.06 and 13,484.36

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Solution

The fourth proportional to 21,291.95, 31,905.06 and 13,484.36 is: 20,205.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.95 : 31,905.06 = 13,484.36 : x
  2. Step 2: Convert to fraction form
    21,291.95/31,905.06 = 13,484.36/x
  3. Step 3: Cross multiply
    21,291.95x = 31,905.06 × 13,484.36
  4. Step 4: Simplify right side
    21,291.95x = 430,219,155.34
  5. Step 5: Solve for x
    x = 430,219,155.34/21,291.95
  6. Step 6: Final answer
    x = 20,205.72

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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.