Home / 21,315.37-31,914.99-15,398.32

Finding the Fourth Proportional to 21,315.37, 31,914.99 and 15,398.32

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Solution

The fourth proportional to 21,315.37, 31,914.99 and 15,398.32 is: 23,055.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.37 : 31,914.99 = 15,398.32 : x
  2. Step 2: Convert to fraction form
    21,315.37/31,914.99 = 15,398.32/x
  3. Step 3: Cross multiply
    21,315.37x = 31,914.99 × 15,398.32
  4. Step 4: Simplify right side
    21,315.37x = 491,437,228.82
  5. Step 5: Solve for x
    x = 491,437,228.82/21,315.37
  6. Step 6: Final answer
    x = 23,055.53

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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.