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Finding the Fourth Proportional to 21,053.98, 31,570.37 and 7,008.99

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Solution

The fourth proportional to 21,053.98, 31,570.37 and 7,008.99 is: 10,509.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,053.98 : 31,570.37 = 7,008.99 : x
  2. Step 2: Convert to fraction form
    21,053.98/31,570.37 = 7,008.99/x
  3. Step 3: Cross multiply
    21,053.98x = 31,570.37 × 7,008.99
  4. Step 4: Simplify right side
    21,053.98x = 221,276,566.56
  5. Step 5: Solve for x
    x = 221,276,566.56/21,053.98
  6. Step 6: Final answer
    x = 10,509.97

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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.