Home / 21,153.25-31,730.39-7,113.46

Finding the Fourth Proportional to 21,153.25, 31,730.39 and 7,113.46

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Solution

The fourth proportional to 21,153.25, 31,730.39 and 7,113.46 is: 10,670.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.25 : 31,730.39 = 7,113.46 : x
  2. Step 2: Convert to fraction form
    21,153.25/31,730.39 = 7,113.46/x
  3. Step 3: Cross multiply
    21,153.25x = 31,730.39 × 7,113.46
  4. Step 4: Simplify right side
    21,153.25x = 225,712,860.05
  5. Step 5: Solve for x
    x = 225,712,860.05/21,153.25
  6. Step 6: Final answer
    x = 10,670.36

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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.