Home / 31,987.60-44,139.88-30,912.74

Finding the Fourth Proportional to 31,987.60, 44,139.88 and 30,912.74

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Solution

The fourth proportional to 31,987.60, 44,139.88 and 30,912.74 is: 42,656.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,987.60 : 44,139.88 = 30,912.74 : x
  2. Step 2: Convert to fraction form
    31,987.60/44,139.88 = 30,912.74/x
  3. Step 3: Cross multiply
    31,987.60x = 44,139.88 × 30,912.74
  4. Step 4: Simplify right side
    31,987.60x = 1,364,484,634.07
  5. Step 5: Solve for x
    x = 1,364,484,634.07/31,987.60
  6. Step 6: Final answer
    x = 42,656.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.