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Finding the Fourth Proportional to 12,390.58, 17,099.25 and 7,013.01

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Solution

The fourth proportional to 12,390.58, 17,099.25 and 7,013.01 is: 9,678.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.58 : 17,099.25 = 7,013.01 : x
  2. Step 2: Convert to fraction form
    12,390.58/17,099.25 = 7,013.01/x
  3. Step 3: Cross multiply
    12,390.58x = 17,099.25 × 7,013.01
  4. Step 4: Simplify right side
    12,390.58x = 119,917,193.71
  5. Step 5: Solve for x
    x = 119,917,193.71/12,390.58
  6. Step 6: Final answer
    x = 9,678.10

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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.