Home / 21,006.45-31,515.80-6,215.76

Finding the Fourth Proportional to 21,006.45, 31,515.80 and 6,215.76

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Solution

The fourth proportional to 21,006.45, 31,515.80 and 6,215.76 is: 9,325.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.45 : 31,515.80 = 6,215.76 : x
  2. Step 2: Convert to fraction form
    21,006.45/31,515.80 = 6,215.76/x
  3. Step 3: Cross multiply
    21,006.45x = 31,515.80 × 6,215.76
  4. Step 4: Simplify right side
    21,006.45x = 195,894,617.93
  5. Step 5: Solve for x
    x = 195,894,617.93/21,006.45
  6. Step 6: Final answer
    x = 9,325.45

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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.