Home / 21,311.42-31,970.71-6,516.87

Finding the Fourth Proportional to 21,311.42, 31,970.71 and 6,516.87

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Solution

The fourth proportional to 21,311.42, 31,970.71 and 6,516.87 is: 9,776.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.42 : 31,970.71 = 6,516.87 : x
  2. Step 2: Convert to fraction form
    21,311.42/31,970.71 = 6,516.87/x
  3. Step 3: Cross multiply
    21,311.42x = 31,970.71 × 6,516.87
  4. Step 4: Simplify right side
    21,311.42x = 208,348,928.29
  5. Step 5: Solve for x
    x = 208,348,928.29/21,311.42
  6. Step 6: Final answer
    x = 9,776.40

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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.