Home / 21,030.60-31,539.42-6,987.63

Finding the Fourth Proportional to 21,030.60, 31,539.42 and 6,987.63

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Solution

The fourth proportional to 21,030.60, 31,539.42 and 6,987.63 is: 10,479.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.60 : 31,539.42 = 6,987.63 : x
  2. Step 2: Convert to fraction form
    21,030.60/31,539.42 = 6,987.63/x
  3. Step 3: Cross multiply
    21,030.60x = 31,539.42 × 6,987.63
  4. Step 4: Simplify right side
    21,030.60x = 220,385,797.37
  5. Step 5: Solve for x
    x = 220,385,797.37/21,030.60
  6. Step 6: Final answer
    x = 10,479.29

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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.