Home / 28,238.88-38,970.18-15,493.26

Finding the Fourth Proportional to 28,238.88, 38,970.18 and 15,493.26

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Solution

The fourth proportional to 28,238.88, 38,970.18 and 15,493.26 is: 21,380.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,238.88 : 38,970.18 = 15,493.26 : x
  2. Step 2: Convert to fraction form
    28,238.88/38,970.18 = 15,493.26/x
  3. Step 3: Cross multiply
    28,238.88x = 38,970.18 × 15,493.26
  4. Step 4: Simplify right side
    28,238.88x = 603,775,130.99
  5. Step 5: Solve for x
    x = 603,775,130.99/28,238.88
  6. Step 6: Final answer
    x = 21,380.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.