Home / 9,990.04-13,780.32-6,455.34

Finding the Fourth Proportional to 9,990.04, 13,780.32 and 6,455.34

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Solution

The fourth proportional to 9,990.04, 13,780.32 and 6,455.34 is: 8,904.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.04 : 13,780.32 = 6,455.34 : x
  2. Step 2: Convert to fraction form
    9,990.04/13,780.32 = 6,455.34/x
  3. Step 3: Cross multiply
    9,990.04x = 13,780.32 × 6,455.34
  4. Step 4: Simplify right side
    9,990.04x = 88,956,650.91
  5. Step 5: Solve for x
    x = 88,956,650.91/9,990.04
  6. Step 6: Final answer
    x = 8,904.53

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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.