Home / 21,332.16-31,985.28-8,196.48

Finding the Fourth Proportional to 21,332.16, 31,985.28 and 8,196.48

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Solution

The fourth proportional to 21,332.16, 31,985.28 and 8,196.48 is: 12,289.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,332.16 : 31,985.28 = 8,196.48 : x
  2. Step 2: Convert to fraction form
    21,332.16/31,985.28 = 8,196.48/x
  3. Step 3: Cross multiply
    21,332.16x = 31,985.28 × 8,196.48
  4. Step 4: Simplify right side
    21,332.16x = 262,166,707.81
  5. Step 5: Solve for x
    x = 262,166,707.81/21,332.16
  6. Step 6: Final answer
    x = 12,289.74

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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.