Home / 31,386.29-47,079.43-19,707.71

Finding the Fourth Proportional to 31,386.29, 47,079.43 and 19,707.71

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Solution

The fourth proportional to 31,386.29, 47,079.43 and 19,707.71 is: 29,561.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,386.29 : 47,079.43 = 19,707.71 : x
  2. Step 2: Convert to fraction form
    31,386.29/47,079.43 = 19,707.71/x
  3. Step 3: Cross multiply
    31,386.29x = 47,079.43 × 19,707.71
  4. Step 4: Simplify right side
    31,386.29x = 927,827,468.74
  5. Step 5: Solve for x
    x = 927,827,468.74/31,386.29
  6. Step 6: Final answer
    x = 29,561.56

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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.