Home / 21,007.72-31,478.75-13,200.13

Finding the Fourth Proportional to 21,007.72, 31,478.75 and 13,200.13

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Solution

The fourth proportional to 21,007.72, 31,478.75 and 13,200.13 is: 19,779.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.72 : 31,478.75 = 13,200.13 : x
  2. Step 2: Convert to fraction form
    21,007.72/31,478.75 = 13,200.13/x
  3. Step 3: Cross multiply
    21,007.72x = 31,478.75 × 13,200.13
  4. Step 4: Simplify right side
    21,007.72x = 415,523,592.24
  5. Step 5: Solve for x
    x = 415,523,592.24/21,007.72
  6. Step 6: Final answer
    x = 19,779.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.