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Finding the Fourth Proportional to 13,021.79, 17,970.01 and 7,053.47

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Solution

The fourth proportional to 13,021.79, 17,970.01 and 7,053.47 is: 9,733.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,021.79 : 17,970.01 = 7,053.47 : x
  2. Step 2: Convert to fraction form
    13,021.79/17,970.01 = 7,053.47/x
  3. Step 3: Cross multiply
    13,021.79x = 17,970.01 × 7,053.47
  4. Step 4: Simplify right side
    13,021.79x = 126,750,851.15
  5. Step 5: Solve for x
    x = 126,750,851.15/13,021.79
  6. Step 6: Final answer
    x = 9,733.75

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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.