Home / 28,387.50-39,174.75-15,811.98

Finding the Fourth Proportional to 28,387.50, 39,174.75 and 15,811.98

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Solution

The fourth proportional to 28,387.50, 39,174.75 and 15,811.98 is: 21,820.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,387.50 : 39,174.75 = 15,811.98 : x
  2. Step 2: Convert to fraction form
    28,387.50/39,174.75 = 15,811.98/x
  3. Step 3: Cross multiply
    28,387.50x = 39,174.75 × 15,811.98
  4. Step 4: Simplify right side
    28,387.50x = 619,430,363.51
  5. Step 5: Solve for x
    x = 619,430,363.51/28,387.50
  6. Step 6: Final answer
    x = 21,820.53

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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.