Home / 15,155.64-20,911.59-8,781.84

Finding the Fourth Proportional to 15,155.64, 20,911.59 and 8,781.84

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Solution

The fourth proportional to 15,155.64, 20,911.59 and 8,781.84 is: 12,117.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.64 : 20,911.59 = 8,781.84 : x
  2. Step 2: Convert to fraction form
    15,155.64/20,911.59 = 8,781.84/x
  3. Step 3: Cross multiply
    15,155.64x = 20,911.59 × 8,781.84
  4. Step 4: Simplify right side
    15,155.64x = 183,642,237.53
  5. Step 5: Solve for x
    x = 183,642,237.53/15,155.64
  6. Step 6: Final answer
    x = 12,117.09

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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.