Home / 13,989.47-20,988.27-4,128.84

Finding the Fourth Proportional to 13,989.47, 20,988.27 and 4,128.84

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Solution

The fourth proportional to 13,989.47, 20,988.27 and 4,128.84 is: 6,194.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.47 : 20,988.27 = 4,128.84 : x
  2. Step 2: Convert to fraction form
    13,989.47/20,988.27 = 4,128.84/x
  3. Step 3: Cross multiply
    13,989.47x = 20,988.27 × 4,128.84
  4. Step 4: Simplify right side
    13,989.47x = 86,657,208.71
  5. Step 5: Solve for x
    x = 86,657,208.71/13,989.47
  6. Step 6: Final answer
    x = 6,194.46

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1.5x scale

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.