Home / 15,411.36-21,268.08-9,128.64

Finding the Fourth Proportional to 15,411.36, 21,268.08 and 9,128.64

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Solution

The fourth proportional to 15,411.36, 21,268.08 and 9,128.64 is: 12,597.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,411.36 : 21,268.08 = 9,128.64 : x
  2. Step 2: Convert to fraction form
    15,411.36/21,268.08 = 9,128.64/x
  3. Step 3: Cross multiply
    15,411.36x = 21,268.08 × 9,128.64
  4. Step 4: Simplify right side
    15,411.36x = 194,148,645.81
  5. Step 5: Solve for x
    x = 194,148,645.81/15,411.36
  6. Step 6: Final answer
    x = 12,597.76

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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.