Home / 21,219.36-31,830.65-6,429.50

Finding the Fourth Proportional to 21,219.36, 31,830.65 and 6,429.50

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Solution

The fourth proportional to 21,219.36, 31,830.65 and 6,429.50 is: 9,644.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.36 : 31,830.65 = 6,429.50 : x
  2. Step 2: Convert to fraction form
    21,219.36/31,830.65 = 6,429.50/x
  3. Step 3: Cross multiply
    21,219.36x = 31,830.65 × 6,429.50
  4. Step 4: Simplify right side
    21,219.36x = 204,655,164.18
  5. Step 5: Solve for x
    x = 204,655,164.18/21,219.36
  6. Step 6: Final answer
    x = 9,644.74

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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.