Home / 15,429.90-21,293.11-8,715.51

Finding the Fourth Proportional to 15,429.90, 21,293.11 and 8,715.51

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Solution

The fourth proportional to 15,429.90, 21,293.11 and 8,715.51 is: 12,027.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.90 : 21,293.11 = 8,715.51 : x
  2. Step 2: Convert to fraction form
    15,429.90/21,293.11 = 8,715.51/x
  3. Step 3: Cross multiply
    15,429.90x = 21,293.11 × 8,715.51
  4. Step 4: Simplify right side
    15,429.90x = 185,580,313.14
  5. Step 5: Solve for x
    x = 185,580,313.14/15,429.90
  6. Step 6: Final answer
    x = 12,027.32

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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.