Home / 21,246.47-31,870.38-6,455.51

Finding the Fourth Proportional to 21,246.47, 31,870.38 and 6,455.51

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Solution

The fourth proportional to 21,246.47, 31,870.38 and 6,455.51 is: 9,683.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,246.47 : 31,870.38 = 6,455.51 : x
  2. Step 2: Convert to fraction form
    21,246.47/31,870.38 = 6,455.51/x
  3. Step 3: Cross multiply
    21,246.47x = 31,870.38 × 6,455.51
  4. Step 4: Simplify right side
    21,246.47x = 205,739,684.12
  5. Step 5: Solve for x
    x = 205,739,684.12/21,246.47
  6. Step 6: Final answer
    x = 9,683.48

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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.