Home / 13,612.40-20,420.43-13,368.18

Finding the Fourth Proportional to 13,612.40, 20,420.43 and 13,368.18

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Solution

The fourth proportional to 13,612.40, 20,420.43 and 13,368.18 is: 20,054.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.40 : 20,420.43 = 13,368.18 : x
  2. Step 2: Convert to fraction form
    13,612.40/20,420.43 = 13,368.18/x
  3. Step 3: Cross multiply
    13,612.40x = 20,420.43 × 13,368.18
  4. Step 4: Simplify right side
    13,612.40x = 272,984,010.36
  5. Step 5: Solve for x
    x = 272,984,010.36/13,612.40
  6. Step 6: Final answer
    x = 20,054.07

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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.