Home / 20,428.61-28,201.97-14,130.05

Finding the Fourth Proportional to 20,428.61, 28,201.97 and 14,130.05

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Solution

The fourth proportional to 20,428.61, 28,201.97 and 14,130.05 is: 19,506.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.61 : 28,201.97 = 14,130.05 : x
  2. Step 2: Convert to fraction form
    20,428.61/28,201.97 = 14,130.05/x
  3. Step 3: Cross multiply
    20,428.61x = 28,201.97 × 14,130.05
  4. Step 4: Simplify right side
    20,428.61x = 398,495,140.51
  5. Step 5: Solve for x
    x = 398,495,140.51/20,428.61
  6. Step 6: Final answer
    x = 19,506.72

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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.