Home / 28,421.91-39,222.63-15,675.62

Finding the Fourth Proportional to 28,421.91, 39,222.63 and 15,675.62

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Solution

The fourth proportional to 28,421.91, 39,222.63 and 15,675.62 is: 21,632.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.91 : 39,222.63 = 15,675.62 : x
  2. Step 2: Convert to fraction form
    28,421.91/39,222.63 = 15,675.62/x
  3. Step 3: Cross multiply
    28,421.91x = 39,222.63 × 15,675.62
  4. Step 4: Simplify right side
    28,421.91x = 614,838,847.17
  5. Step 5: Solve for x
    x = 614,838,847.17/28,421.91
  6. Step 6: Final answer
    x = 21,632.57

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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.