Home / 15,138.81-20,894.63-8,853.21

Finding the Fourth Proportional to 15,138.81, 20,894.63 and 8,853.21

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Solution

The fourth proportional to 15,138.81, 20,894.63 and 8,853.21 is: 12,219.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,138.81 : 20,894.63 = 8,853.21 : x
  2. Step 2: Convert to fraction form
    15,138.81/20,894.63 = 8,853.21/x
  3. Step 3: Cross multiply
    15,138.81x = 20,894.63 × 8,853.21
  4. Step 4: Simplify right side
    15,138.81x = 184,984,503.00
  5. Step 5: Solve for x
    x = 184,984,503.00/15,138.81
  6. Step 6: Final answer
    x = 12,219.22

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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.