Home / 20,907.48-28,842.90-12,409.95

Finding the Fourth Proportional to 20,907.48, 28,842.90 and 12,409.95

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Solution

The fourth proportional to 20,907.48, 28,842.90 and 12,409.95 is: 17,120.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.48 : 28,842.90 = 12,409.95 : x
  2. Step 2: Convert to fraction form
    20,907.48/28,842.90 = 12,409.95/x
  3. Step 3: Cross multiply
    20,907.48x = 28,842.90 × 12,409.95
  4. Step 4: Simplify right side
    20,907.48x = 357,938,946.86
  5. Step 5: Solve for x
    x = 357,938,946.86/20,907.48
  6. Step 6: Final answer
    x = 17,120.14

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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.