Home / 23,121.86-31,904.93-12,913.01

Finding the Fourth Proportional to 23,121.86, 31,904.93 and 12,913.01

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Solution

The fourth proportional to 23,121.86, 31,904.93 and 12,913.01 is: 17,818.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,121.86 : 31,904.93 = 12,913.01 : x
  2. Step 2: Convert to fraction form
    23,121.86/31,904.93 = 12,913.01/x
  3. Step 3: Cross multiply
    23,121.86x = 31,904.93 × 12,913.01
  4. Step 4: Simplify right side
    23,121.86x = 411,988,456.05
  5. Step 5: Solve for x
    x = 411,988,456.05/23,121.86
  6. Step 6: Final answer
    x = 17,818.14

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1.5x scale

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.