Home / 20,992.48-28,929.76-15,013.77

Finding the Fourth Proportional to 20,992.48, 28,929.76 and 15,013.77

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Solution

The fourth proportional to 20,992.48, 28,929.76 and 15,013.77 is: 20,690.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.48 : 28,929.76 = 15,013.77 : x
  2. Step 2: Convert to fraction form
    20,992.48/28,929.76 = 15,013.77/x
  3. Step 3: Cross multiply
    20,992.48x = 28,929.76 × 15,013.77
  4. Step 4: Simplify right side
    20,992.48x = 434,344,762.80
  5. Step 5: Solve for x
    x = 434,344,762.80/20,992.48
  6. Step 6: Final answer
    x = 20,690.49

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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.