Home / 30,580.21-42,201.09-18,479.01

Finding the Fourth Proportional to 30,580.21, 42,201.09 and 18,479.01

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Solution

The fourth proportional to 30,580.21, 42,201.09 and 18,479.01 is: 25,501.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,580.21 : 42,201.09 = 18,479.01 : x
  2. Step 2: Convert to fraction form
    30,580.21/42,201.09 = 18,479.01/x
  3. Step 3: Cross multiply
    30,580.21x = 42,201.09 × 18,479.01
  4. Step 4: Simplify right side
    30,580.21x = 779,834,364.12
  5. Step 5: Solve for x
    x = 779,834,364.12/30,580.21
  6. Step 6: Final answer
    x = 25,501.28

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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.