Home / 13,115.86-18,090.60-12,681.94

Finding the Fourth Proportional to 13,115.86, 18,090.60 and 12,681.94

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Solution

The fourth proportional to 13,115.86, 18,090.60 and 12,681.94 is: 17,492.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.86 : 18,090.60 = 12,681.94 : x
  2. Step 2: Convert to fraction form
    13,115.86/18,090.60 = 12,681.94/x
  3. Step 3: Cross multiply
    13,115.86x = 18,090.60 × 12,681.94
  4. Step 4: Simplify right side
    13,115.86x = 229,423,903.76
  5. Step 5: Solve for x
    x = 229,423,903.76/13,115.86
  6. Step 6: Final answer
    x = 17,492.10

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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.