Home / 13,328.81-19,985.77-8,387.86

Finding the Fourth Proportional to 13,328.81, 19,985.77 and 8,387.86

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Solution

The fourth proportional to 13,328.81, 19,985.77 and 8,387.86 is: 12,577.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,328.81 : 19,985.77 = 8,387.86 : x
  2. Step 2: Convert to fraction form
    13,328.81/19,985.77 = 8,387.86/x
  3. Step 3: Cross multiply
    13,328.81x = 19,985.77 × 8,387.86
  4. Step 4: Simplify right side
    13,328.81x = 167,637,838.75
  5. Step 5: Solve for x
    x = 167,637,838.75/13,328.81
  6. Step 6: Final answer
    x = 12,577.11

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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.