Home / 21,162.65-31,557.48-20,972.93

Finding the Fourth Proportional to 21,162.65, 31,557.48 and 20,972.93

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Solution

The fourth proportional to 21,162.65, 31,557.48 and 20,972.93 is: 31,274.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,162.65 : 31,557.48 = 20,972.93 : x
  2. Step 2: Convert to fraction form
    21,162.65/31,557.48 = 20,972.93/x
  3. Step 3: Cross multiply
    21,162.65x = 31,557.48 × 20,972.93
  4. Step 4: Simplify right side
    21,162.65x = 661,852,661.23
  5. Step 5: Solve for x
    x = 661,852,661.23/21,162.65
  6. Step 6: Final answer
    x = 31,274.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.