Home / 21,007.19-31,515.47-9,162.89

Finding the Fourth Proportional to 21,007.19, 31,515.47 and 9,162.89

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Solution

The fourth proportional to 21,007.19, 31,515.47 and 9,162.89 is: 13,746.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.19 : 31,515.47 = 9,162.89 : x
  2. Step 2: Convert to fraction form
    21,007.19/31,515.47 = 9,162.89/x
  3. Step 3: Cross multiply
    21,007.19x = 31,515.47 × 9,162.89
  4. Step 4: Simplify right side
    21,007.19x = 288,772,734.06
  5. Step 5: Solve for x
    x = 288,772,734.06/21,007.19
  6. Step 6: Final answer
    x = 13,746.37

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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.