Home / 20,840.76-28,762.56-11,890.47

Finding the Fourth Proportional to 20,840.76, 28,762.56 and 11,890.47

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Solution

The fourth proportional to 20,840.76, 28,762.56 and 11,890.47 is: 16,410.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.76 : 28,762.56 = 11,890.47 : x
  2. Step 2: Convert to fraction form
    20,840.76/28,762.56 = 11,890.47/x
  3. Step 3: Cross multiply
    20,840.76x = 28,762.56 × 11,890.47
  4. Step 4: Simplify right side
    20,840.76x = 342,000,356.80
  5. Step 5: Solve for x
    x = 342,000,356.80/20,840.76
  6. Step 6: Final answer
    x = 16,410.17

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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.