Home / 20,970.56-28,908.36-13,416.08

Finding the Fourth Proportional to 20,970.56, 28,908.36 and 13,416.08

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Solution

The fourth proportional to 20,970.56, 28,908.36 and 13,416.08 is: 18,494.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.56 : 28,908.36 = 13,416.08 : x
  2. Step 2: Convert to fraction form
    20,970.56/28,908.36 = 13,416.08/x
  3. Step 3: Cross multiply
    20,970.56x = 28,908.36 × 13,416.08
  4. Step 4: Simplify right side
    20,970.56x = 387,836,870.43
  5. Step 5: Solve for x
    x = 387,836,870.43/20,970.56
  6. Step 6: Final answer
    x = 18,494.35

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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.