Home / 20,991.04-28,967.88-11,559.76

Finding the Fourth Proportional to 20,991.04, 28,967.88 and 11,559.76

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Solution

The fourth proportional to 20,991.04, 28,967.88 and 11,559.76 is: 15,952.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.04 : 28,967.88 = 11,559.76 : x
  2. Step 2: Convert to fraction form
    20,991.04/28,967.88 = 11,559.76/x
  3. Step 3: Cross multiply
    20,991.04x = 28,967.88 × 11,559.76
  4. Step 4: Simplify right side
    20,991.04x = 334,861,740.51
  5. Step 5: Solve for x
    x = 334,861,740.51/20,991.04
  6. Step 6: Final answer
    x = 15,952.60

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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.