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Finding the Fourth Proportional to 13,010.36, 17,953.98 and 7,421

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Solution

The fourth proportional to 13,010.36, 17,953.98 and 7,421 is: 10,240.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,010.36 : 17,953.98 = 7,421 : x
  2. Step 2: Convert to fraction form
    13,010.36/17,953.98 = 7,421/x
  3. Step 3: Cross multiply
    13,010.36x = 17,953.98 × 7,421
  4. Step 4: Simplify right side
    13,010.36x = 133,236,485.58
  5. Step 5: Solve for x
    x = 133,236,485.58/13,010.36
  6. Step 6: Final answer
    x = 10,240.80

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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.