Home / 21,210.72-29,281.32-13,257.36

Finding the Fourth Proportional to 21,210.72, 29,281.32 and 13,257.36

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Solution

The fourth proportional to 21,210.72, 29,281.32 and 13,257.36 is: 18,301.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.72 : 29,281.32 = 13,257.36 : x
  2. Step 2: Convert to fraction form
    21,210.72/29,281.32 = 13,257.36/x
  3. Step 3: Cross multiply
    21,210.72x = 29,281.32 × 13,257.36
  4. Step 4: Simplify right side
    21,210.72x = 388,193,000.52
  5. Step 5: Solve for x
    x = 388,193,000.52/21,210.72
  6. Step 6: Final answer
    x = 18,301.74

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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.