Home / 8,990.48-13,485.30-3,148.40

Finding the Fourth Proportional to 8,990.48, 13,485.30 and 3,148.40

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Solution

The fourth proportional to 8,990.48, 13,485.30 and 3,148.40 is: 4,722.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.48 : 13,485.30 = 3,148.40 : x
  2. Step 2: Convert to fraction form
    8,990.48/13,485.30 = 3,148.40/x
  3. Step 3: Cross multiply
    8,990.48x = 13,485.30 × 3,148.40
  4. Step 4: Simplify right side
    8,990.48x = 42,457,118.52
  5. Step 5: Solve for x
    x = 42,457,118.52/8,990.48
  6. Step 6: Final answer
    x = 4,722.45

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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.