Home / 20,970.12-28,948.40-13,017.03

Finding the Fourth Proportional to 20,970.12, 28,948.40 and 13,017.03

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Solution

The fourth proportional to 20,970.12, 28,948.40 and 13,017.03 is: 17,969.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.12 : 28,948.40 = 13,017.03 : x
  2. Step 2: Convert to fraction form
    20,970.12/28,948.40 = 13,017.03/x
  3. Step 3: Cross multiply
    20,970.12x = 28,948.40 × 13,017.03
  4. Step 4: Simplify right side
    20,970.12x = 376,822,191.25
  5. Step 5: Solve for x
    x = 376,822,191.25/20,970.12
  6. Step 6: Final answer
    x = 17,969.48

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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.