Home / 18,967.04-28,427.48-13,421.98

Finding the Fourth Proportional to 18,967.04, 28,427.48 and 13,421.98

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Solution

The fourth proportional to 18,967.04, 28,427.48 and 13,421.98 is: 20,116.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,967.04 : 28,427.48 = 13,421.98 : x
  2. Step 2: Convert to fraction form
    18,967.04/28,427.48 = 13,421.98/x
  3. Step 3: Cross multiply
    18,967.04x = 28,427.48 × 13,421.98
  4. Step 4: Simplify right side
    18,967.04x = 381,553,068.01
  5. Step 5: Solve for x
    x = 381,553,068.01/18,967.04
  6. Step 6: Final answer
    x = 20,116.64

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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.