Home / 31,718.12-47,574.47-12,992.81

Finding the Fourth Proportional to 31,718.12, 47,574.47 and 12,992.81

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Solution

The fourth proportional to 31,718.12, 47,574.47 and 12,992.81 is: 19,488.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,718.12 : 47,574.47 = 12,992.81 : x
  2. Step 2: Convert to fraction form
    31,718.12/47,574.47 = 12,992.81/x
  3. Step 3: Cross multiply
    31,718.12x = 47,574.47 × 12,992.81
  4. Step 4: Simplify right side
    31,718.12x = 618,125,844.17
  5. Step 5: Solve for x
    x = 618,125,844.17/31,718.12
  6. Step 6: Final answer
    x = 19,488.10

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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.