Home / 20,801.19-31,172.63-10,920.51

Finding the Fourth Proportional to 20,801.19, 31,172.63 and 10,920.51

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Solution

The fourth proportional to 20,801.19, 31,172.63 and 10,920.51 is: 16,365.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.19 : 31,172.63 = 10,920.51 : x
  2. Step 2: Convert to fraction form
    20,801.19/31,172.63 = 10,920.51/x
  3. Step 3: Cross multiply
    20,801.19x = 31,172.63 × 10,920.51
  4. Step 4: Simplify right side
    20,801.19x = 340,421,017.64
  5. Step 5: Solve for x
    x = 340,421,017.64/20,801.19
  6. Step 6: Final answer
    x = 16,365.46

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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.