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Finding the Fourth Proportional to 12,423.51, 17,148.51 and 7,953.93

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Solution

The fourth proportional to 12,423.51, 17,148.51 and 7,953.93 is: 10,979.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,423.51 : 17,148.51 = 7,953.93 : x
  2. Step 2: Convert to fraction form
    12,423.51/17,148.51 = 7,953.93/x
  3. Step 3: Cross multiply
    12,423.51x = 17,148.51 × 7,953.93
  4. Step 4: Simplify right side
    12,423.51x = 136,398,048.14
  5. Step 5: Solve for x
    x = 136,398,048.14/12,423.51
  6. Step 6: Final answer
    x = 10,979.03

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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.