Home / 39,990.40-59,985.68-10,408.20

Finding the Fourth Proportional to 39,990.40, 59,985.68 and 10,408.20

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Solution

The fourth proportional to 39,990.40, 59,985.68 and 10,408.20 is: 15,612.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,990.40 : 59,985.68 = 10,408.20 : x
  2. Step 2: Convert to fraction form
    39,990.40/59,985.68 = 10,408.20/x
  3. Step 3: Cross multiply
    39,990.40x = 59,985.68 × 10,408.20
  4. Step 4: Simplify right side
    39,990.40x = 624,342,954.58
  5. Step 5: Solve for x
    x = 624,342,954.58/39,990.40
  6. Step 6: Final answer
    x = 15,612.32

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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.