Home / 31,515.90-47,290.46-13,987.50

Finding the Fourth Proportional to 31,515.90, 47,290.46 and 13,987.50

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Solution

The fourth proportional to 31,515.90, 47,290.46 and 13,987.50 is: 20,988.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,515.90 : 47,290.46 = 13,987.50 : x
  2. Step 2: Convert to fraction form
    31,515.90/47,290.46 = 13,987.50/x
  3. Step 3: Cross multiply
    31,515.90x = 47,290.46 × 13,987.50
  4. Step 4: Simplify right side
    31,515.90x = 661,475,239.31
  5. Step 5: Solve for x
    x = 661,475,239.31/31,515.90
  6. Step 6: Final answer
    x = 20,988.62

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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.