Home / 21,210.11-31,807.05-6,975.26

Finding the Fourth Proportional to 21,210.11, 31,807.05 and 6,975.26

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Solution

The fourth proportional to 21,210.11, 31,807.05 and 6,975.26 is: 10,460.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.11 : 31,807.05 = 6,975.26 : x
  2. Step 2: Convert to fraction form
    21,210.11/31,807.05 = 6,975.26/x
  3. Step 3: Cross multiply
    21,210.11x = 31,807.05 × 6,975.26
  4. Step 4: Simplify right side
    21,210.11x = 221,862,284.55
  5. Step 5: Solve for x
    x = 221,862,284.55/21,210.11
  6. Step 6: Final answer
    x = 10,460.22

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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.