Home / 28,566.80-39,421.24-15,820.50

Finding the Fourth Proportional to 28,566.80, 39,421.24 and 15,820.50

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Solution

The fourth proportional to 28,566.80, 39,421.24 and 15,820.50 is: 21,831.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,566.80 : 39,421.24 = 15,820.50 : x
  2. Step 2: Convert to fraction form
    28,566.80/39,421.24 = 15,820.50/x
  3. Step 3: Cross multiply
    28,566.80x = 39,421.24 × 15,820.50
  4. Step 4: Simplify right side
    28,566.80x = 623,663,727.42
  5. Step 5: Solve for x
    x = 623,663,727.42/28,566.80
  6. Step 6: Final answer
    x = 21,831.77

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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.