Home / 8,421.20-11,612.63-5,587.58

Finding the Fourth Proportional to 8,421.20, 11,612.63 and 5,587.58

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Solution

The fourth proportional to 8,421.20, 11,612.63 and 5,587.58 is: 7,705.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.20 : 11,612.63 = 5,587.58 : x
  2. Step 2: Convert to fraction form
    8,421.20/11,612.63 = 5,587.58/x
  3. Step 3: Cross multiply
    8,421.20x = 11,612.63 × 5,587.58
  4. Step 4: Simplify right side
    8,421.20x = 64,886,499.14
  5. Step 5: Solve for x
    x = 64,886,499.14/8,421.20
  6. Step 6: Final answer
    x = 7,705.14

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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.