Home / 21,022.50-31,539.36-7,876.20

Finding the Fourth Proportional to 21,022.50, 31,539.36 and 7,876.20

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Solution

The fourth proportional to 21,022.50, 31,539.36 and 7,876.20 is: 11,816.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.50 : 31,539.36 = 7,876.20 : x
  2. Step 2: Convert to fraction form
    21,022.50/31,539.36 = 7,876.20/x
  3. Step 3: Cross multiply
    21,022.50x = 31,539.36 × 7,876.20
  4. Step 4: Simplify right side
    21,022.50x = 248,410,307.23
  5. Step 5: Solve for x
    x = 248,410,307.23/21,022.50
  6. Step 6: Final answer
    x = 11,816.40

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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.