Home / 12,985.52-19,479.36-5,590.16

Finding the Fourth Proportional to 12,985.52, 19,479.36 and 5,590.16

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Solution

The fourth proportional to 12,985.52, 19,479.36 and 5,590.16 is: 8,385.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.52 : 19,479.36 = 5,590.16 : x
  2. Step 2: Convert to fraction form
    12,985.52/19,479.36 = 5,590.16/x
  3. Step 3: Cross multiply
    12,985.52x = 19,479.36 × 5,590.16
  4. Step 4: Simplify right side
    12,985.52x = 108,892,739.10
  5. Step 5: Solve for x
    x = 108,892,739.10/12,985.52
  6. Step 6: Final answer
    x = 8,385.70

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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.