Home / 21,139.40-31,706.58-5,558.24

Finding the Fourth Proportional to 21,139.40, 31,706.58 and 5,558.24

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Solution

The fourth proportional to 21,139.40, 31,706.58 and 5,558.24 is: 8,336.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.40 : 31,706.58 = 5,558.24 : x
  2. Step 2: Convert to fraction form
    21,139.40/31,706.58 = 5,558.24/x
  3. Step 3: Cross multiply
    21,139.40x = 31,706.58 × 5,558.24
  4. Step 4: Simplify right side
    21,139.40x = 176,232,881.33
  5. Step 5: Solve for x
    x = 176,232,881.33/21,139.40
  6. Step 6: Final answer
    x = 8,336.70

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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.