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Finding the Fourth Proportional to 31,987.79, 47,979.95 and 9,801.23

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Solution

The fourth proportional to 31,987.79, 47,979.95 and 9,801.23 is: 14,701.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,987.79 : 47,979.95 = 9,801.23 : x
  2. Step 2: Convert to fraction form
    31,987.79/47,979.95 = 9,801.23/x
  3. Step 3: Cross multiply
    31,987.79x = 47,979.95 × 9,801.23
  4. Step 4: Simplify right side
    31,987.79x = 470,262,272.71
  5. Step 5: Solve for x
    x = 470,262,272.71/31,987.79
  6. Step 6: Final answer
    x = 14,701.31

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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.