Home / 13,489.47-20,128.67-12,088.58

Finding the Fourth Proportional to 13,489.47, 20,128.67 and 12,088.58

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Solution

The fourth proportional to 13,489.47, 20,128.67 and 12,088.58 is: 18,038.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.47 : 20,128.67 = 12,088.58 : x
  2. Step 2: Convert to fraction form
    13,489.47/20,128.67 = 12,088.58/x
  3. Step 3: Cross multiply
    13,489.47x = 20,128.67 × 12,088.58
  4. Step 4: Simplify right side
    13,489.47x = 243,326,921.83
  5. Step 5: Solve for x
    x = 243,326,921.83/13,489.47
  6. Step 6: Final answer
    x = 18,038.29

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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.