Home / 28,263.76-39,005.76-15,688.72

Finding the Fourth Proportional to 28,263.76, 39,005.76 and 15,688.72

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Solution

The fourth proportional to 28,263.76, 39,005.76 and 15,688.72 is: 21,651.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,263.76 : 39,005.76 = 15,688.72 : x
  2. Step 2: Convert to fraction form
    28,263.76/39,005.76 = 15,688.72/x
  3. Step 3: Cross multiply
    28,263.76x = 39,005.76 × 15,688.72
  4. Step 4: Simplify right side
    28,263.76x = 611,950,447.03
  5. Step 5: Solve for x
    x = 611,950,447.03/28,263.76
  6. Step 6: Final answer
    x = 21,651.42

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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.