Home / 31,987.89-47,883.41-20,870.64

Finding the Fourth Proportional to 31,987.89, 47,883.41 and 20,870.64

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Solution

The fourth proportional to 31,987.89, 47,883.41 and 20,870.64 is: 31,241.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,987.89 : 47,883.41 = 20,870.64 : x
  2. Step 2: Convert to fraction form
    31,987.89/47,883.41 = 20,870.64/x
  3. Step 3: Cross multiply
    31,987.89x = 47,883.41 × 20,870.64
  4. Step 4: Simplify right side
    31,987.89x = 999,357,068.31
  5. Step 5: Solve for x
    x = 999,357,068.31/31,987.89
  6. Step 6: Final answer
    x = 31,241.74

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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.