Home / 20,643.34-28,488.48-11,690.65

Finding the Fourth Proportional to 20,643.34, 28,488.48 and 11,690.65

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Solution

The fourth proportional to 20,643.34, 28,488.48 and 11,690.65 is: 16,133.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.34 : 28,488.48 = 11,690.65 : x
  2. Step 2: Convert to fraction form
    20,643.34/28,488.48 = 11,690.65/x
  3. Step 3: Cross multiply
    20,643.34x = 28,488.48 × 11,690.65
  4. Step 4: Simplify right side
    20,643.34x = 333,048,647.82
  5. Step 5: Solve for x
    x = 333,048,647.82/20,643.34
  6. Step 6: Final answer
    x = 16,133.47

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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.