Home / 20,931.39-31,389.30-8,444.66

Finding the Fourth Proportional to 20,931.39, 31,389.30 and 8,444.66

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Solution

The fourth proportional to 20,931.39, 31,389.30 and 8,444.66 is: 12,663.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.39 : 31,389.30 = 8,444.66 : x
  2. Step 2: Convert to fraction form
    20,931.39/31,389.30 = 8,444.66/x
  3. Step 3: Cross multiply
    20,931.39x = 31,389.30 × 8,444.66
  4. Step 4: Simplify right side
    20,931.39x = 265,071,809.19
  5. Step 5: Solve for x
    x = 265,071,809.19/20,931.39
  6. Step 6: Final answer
    x = 12,663.84

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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.