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Finding the Fourth Proportional to 14,421.24, 21,656.61 and 7,860.24

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Solution

The fourth proportional to 14,421.24, 21,656.61 and 7,860.24 is: 11,803.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,421.24 : 21,656.61 = 7,860.24 : x
  2. Step 2: Convert to fraction form
    14,421.24/21,656.61 = 7,860.24/x
  3. Step 3: Cross multiply
    14,421.24x = 21,656.61 × 7,860.24
  4. Step 4: Simplify right side
    14,421.24x = 170,226,152.19
  5. Step 5: Solve for x
    x = 170,226,152.19/14,421.24
  6. Step 6: Final answer
    x = 11,803.85

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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.