Home / 20,715.41-28,587.31-11,283.77

Finding the Fourth Proportional to 20,715.41, 28,587.31 and 11,283.77

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Solution

The fourth proportional to 20,715.41, 28,587.31 and 11,283.77 is: 15,571.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.41 : 28,587.31 = 11,283.77 : x
  2. Step 2: Convert to fraction form
    20,715.41/28,587.31 = 11,283.77/x
  3. Step 3: Cross multiply
    20,715.41x = 28,587.31 × 11,283.77
  4. Step 4: Simplify right side
    20,715.41x = 322,572,459.81
  5. Step 5: Solve for x
    x = 322,572,459.81/20,715.41
  6. Step 6: Final answer
    x = 15,571.62

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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.