Home / 20,970.69-28,940.93-11,539.86

Finding the Fourth Proportional to 20,970.69, 28,940.93 and 11,539.86

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Solution

The fourth proportional to 20,970.69, 28,940.93 and 11,539.86 is: 15,925.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.69 : 28,940.93 = 11,539.86 : x
  2. Step 2: Convert to fraction form
    20,970.69/28,940.93 = 11,539.86/x
  3. Step 3: Cross multiply
    20,970.69x = 28,940.93 × 11,539.86
  4. Step 4: Simplify right side
    20,970.69x = 333,974,280.47
  5. Step 5: Solve for x
    x = 333,974,280.47/20,970.69
  6. Step 6: Final answer
    x = 15,925.76

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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.