Home / 20,838.59-28,756.54-11,888.99

Finding the Fourth Proportional to 20,838.59, 28,756.54 and 11,888.99

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Solution

The fourth proportional to 20,838.59, 28,756.54 and 11,888.99 is: 16,406.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.59 : 28,756.54 = 11,888.99 : x
  2. Step 2: Convert to fraction form
    20,838.59/28,756.54 = 11,888.99/x
  3. Step 3: Cross multiply
    20,838.59x = 28,756.54 × 11,888.99
  4. Step 4: Simplify right side
    20,838.59x = 341,886,216.49
  5. Step 5: Solve for x
    x = 341,886,216.49/20,838.59
  6. Step 6: Final answer
    x = 16,406.40

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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.