Home / 12,389.36-18,587.68-4,990.01

Finding the Fourth Proportional to 12,389.36, 18,587.68 and 4,990.01

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Solution

The fourth proportional to 12,389.36, 18,587.68 and 4,990.01 is: 7,486.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,389.36 : 18,587.68 = 4,990.01 : x
  2. Step 2: Convert to fraction form
    12,389.36/18,587.68 = 4,990.01/x
  3. Step 3: Cross multiply
    12,389.36x = 18,587.68 × 4,990.01
  4. Step 4: Simplify right side
    12,389.36x = 92,752,603.66
  5. Step 5: Solve for x
    x = 92,752,603.66/12,389.36
  6. Step 6: Final answer
    x = 7,486.48

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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.