Home / 15,403.58-21,247.34-9,111.50

Finding the Fourth Proportional to 15,403.58, 21,247.34 and 9,111.50

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Solution

The fourth proportional to 15,403.58, 21,247.34 and 9,111.50 is: 12,568.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.58 : 21,247.34 = 9,111.50 : x
  2. Step 2: Convert to fraction form
    15,403.58/21,247.34 = 9,111.50/x
  3. Step 3: Cross multiply
    15,403.58x = 21,247.34 × 9,111.50
  4. Step 4: Simplify right side
    15,403.58x = 193,595,138.41
  5. Step 5: Solve for x
    x = 193,595,138.41/15,403.58
  6. Step 6: Final answer
    x = 12,568.19

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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.