Home / 13,437.78-20,021.61-12,683.25

Finding the Fourth Proportional to 13,437.78, 20,021.61 and 12,683.25

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Solution

The fourth proportional to 13,437.78, 20,021.61 and 12,683.25 is: 18,897.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,437.78 : 20,021.61 = 12,683.25 : x
  2. Step 2: Convert to fraction form
    13,437.78/20,021.61 = 12,683.25/x
  3. Step 3: Cross multiply
    13,437.78x = 20,021.61 × 12,683.25
  4. Step 4: Simplify right side
    13,437.78x = 253,939,085.03
  5. Step 5: Solve for x
    x = 253,939,085.03/13,437.78
  6. Step 6: Final answer
    x = 18,897.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.