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Finding the Fourth Proportional to 21,055.99, 31,573.42 and 7,011.07

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Solution

The fourth proportional to 21,055.99, 31,573.42 and 7,011.07 is: 10,513.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.99 : 31,573.42 = 7,011.07 : x
  2. Step 2: Convert to fraction form
    21,055.99/31,573.42 = 7,011.07/x
  3. Step 3: Cross multiply
    21,055.99x = 31,573.42 × 7,011.07
  4. Step 4: Simplify right side
    21,055.99x = 221,363,457.76
  5. Step 5: Solve for x
    x = 221,363,457.76/21,055.99
  6. Step 6: Final answer
    x = 10,513.09

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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.