Home / 15,507.32-21,400.54-8,434.19

Finding the Fourth Proportional to 15,507.32, 21,400.54 and 8,434.19

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Solution

The fourth proportional to 15,507.32, 21,400.54 and 8,434.19 is: 11,639.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,507.32 : 21,400.54 = 8,434.19 : x
  2. Step 2: Convert to fraction form
    15,507.32/21,400.54 = 8,434.19/x
  3. Step 3: Cross multiply
    15,507.32x = 21,400.54 × 8,434.19
  4. Step 4: Simplify right side
    15,507.32x = 180,496,252.88
  5. Step 5: Solve for x
    x = 180,496,252.88/15,507.32
  6. Step 6: Final answer
    x = 11,639.43

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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.