Home / 20,782.47-28,678.98-11,707.62

Finding the Fourth Proportional to 20,782.47, 28,678.98 and 11,707.62

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Solution

The fourth proportional to 20,782.47, 28,678.98 and 11,707.62 is: 16,156.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.47 : 28,678.98 = 11,707.62 : x
  2. Step 2: Convert to fraction form
    20,782.47/28,678.98 = 11,707.62/x
  3. Step 3: Cross multiply
    20,782.47x = 28,678.98 × 11,707.62
  4. Step 4: Simplify right side
    20,782.47x = 335,762,599.83
  5. Step 5: Solve for x
    x = 335,762,599.83/20,782.47
  6. Step 6: Final answer
    x = 16,156.05

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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.