Home / 15,438.58-21,305.40-8,365.16

Finding the Fourth Proportional to 15,438.58, 21,305.40 and 8,365.16

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Solution

The fourth proportional to 15,438.58, 21,305.40 and 8,365.16 is: 11,544.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.58 : 21,305.40 = 8,365.16 : x
  2. Step 2: Convert to fraction form
    15,438.58/21,305.40 = 8,365.16/x
  3. Step 3: Cross multiply
    15,438.58x = 21,305.40 × 8,365.16
  4. Step 4: Simplify right side
    15,438.58x = 178,223,079.86
  5. Step 5: Solve for x
    x = 178,223,079.86/15,438.58
  6. Step 6: Final answer
    x = 11,544.01

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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.