Home / 14,390.13-19,859.80-8,421.44

Finding the Fourth Proportional to 14,390.13, 19,859.80 and 8,421.44

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Solution

The fourth proportional to 14,390.13, 19,859.80 and 8,421.44 is: 11,622.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,390.13 : 19,859.80 = 8,421.44 : x
  2. Step 2: Convert to fraction form
    14,390.13/19,859.80 = 8,421.44/x
  3. Step 3: Cross multiply
    14,390.13x = 19,859.80 × 8,421.44
  4. Step 4: Simplify right side
    14,390.13x = 167,248,114.11
  5. Step 5: Solve for x
    x = 167,248,114.11/14,390.13
  6. Step 6: Final answer
    x = 11,622.42

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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.