Home / 21,438.36-29,585.52-12,006.72

Finding the Fourth Proportional to 21,438.36, 29,585.52 and 12,006.72

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Solution

The fourth proportional to 21,438.36, 29,585.52 and 12,006.72 is: 16,569.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.36 : 29,585.52 = 12,006.72 : x
  2. Step 2: Convert to fraction form
    21,438.36/29,585.52 = 12,006.72/x
  3. Step 3: Cross multiply
    21,438.36x = 29,585.52 × 12,006.72
  4. Step 4: Simplify right side
    21,438.36x = 355,225,054.69
  5. Step 5: Solve for x
    x = 355,225,054.69/21,438.36
  6. Step 6: Final answer
    x = 16,569.60

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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.