Home / 9,990.40-14,967.60-4,784.80

Finding the Fourth Proportional to 9,990.40, 14,967.60 and 4,784.80

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Solution

The fourth proportional to 9,990.40, 14,967.60 and 4,784.80 is: 7,168.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.40 : 14,967.60 = 4,784.80 : x
  2. Step 2: Convert to fraction form
    9,990.40/14,967.60 = 4,784.80/x
  3. Step 3: Cross multiply
    9,990.40x = 14,967.60 × 4,784.80
  4. Step 4: Simplify right side
    9,990.40x = 71,616,972.48
  5. Step 5: Solve for x
    x = 71,616,972.48/9,990.40
  6. Step 6: Final answer
    x = 7,168.58

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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.