Home / 13,491.90-18,681.03-12,455.10

Finding the Fourth Proportional to 13,491.90, 18,681.03 and 12,455.10

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Solution

The fourth proportional to 13,491.90, 18,681.03 and 12,455.10 is: 17,245.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.90 : 18,681.03 = 12,455.10 : x
  2. Step 2: Convert to fraction form
    13,491.90/18,681.03 = 12,455.10/x
  3. Step 3: Cross multiply
    13,491.90x = 18,681.03 × 12,455.10
  4. Step 4: Simplify right side
    13,491.90x = 232,674,096.75
  5. Step 5: Solve for x
    x = 232,674,096.75/13,491.90
  6. Step 6: Final answer
    x = 17,245.47

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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.