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Finding the Fourth Proportional to 19,590.88, 29,389.96 and 6,443.76

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Solution

The fourth proportional to 19,590.88, 29,389.96 and 6,443.76 is: 9,666.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,590.88 : 29,389.96 = 6,443.76 : x
  2. Step 2: Convert to fraction form
    19,590.88/29,389.96 = 6,443.76/x
  3. Step 3: Cross multiply
    19,590.88x = 29,389.96 × 6,443.76
  4. Step 4: Simplify right side
    19,590.88x = 189,381,848.65
  5. Step 5: Solve for x
    x = 189,381,848.65/19,590.88
  6. Step 6: Final answer
    x = 9,666.84

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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.