Home / 21,336.29-31,990.74-8,864.93

Finding the Fourth Proportional to 21,336.29, 31,990.74 and 8,864.93

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Solution

The fourth proportional to 21,336.29, 31,990.74 and 8,864.93 is: 13,291.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,336.29 : 31,990.74 = 8,864.93 : x
  2. Step 2: Convert to fraction form
    21,336.29/31,990.74 = 8,864.93/x
  3. Step 3: Cross multiply
    21,336.29x = 31,990.74 × 8,864.93
  4. Step 4: Simplify right side
    21,336.29x = 283,595,670.75
  5. Step 5: Solve for x
    x = 283,595,670.75/21,336.29
  6. Step 6: Final answer
    x = 13,291.70

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1.5x scale

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.