Home / 20,491.64-28,278.93-11,417.60

Finding the Fourth Proportional to 20,491.64, 28,278.93 and 11,417.60

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Solution

The fourth proportional to 20,491.64, 28,278.93 and 11,417.60 is: 15,756.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.64 : 28,278.93 = 11,417.60 : x
  2. Step 2: Convert to fraction form
    20,491.64/28,278.93 = 11,417.60/x
  3. Step 3: Cross multiply
    20,491.64x = 28,278.93 × 11,417.60
  4. Step 4: Simplify right side
    20,491.64x = 322,877,511.17
  5. Step 5: Solve for x
    x = 322,877,511.17/20,491.64
  6. Step 6: Final answer
    x = 15,756.55

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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.