Home / 15,144.76-20,899.28-8,430.16

Finding the Fourth Proportional to 15,144.76, 20,899.28 and 8,430.16

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Solution

The fourth proportional to 15,144.76, 20,899.28 and 8,430.16 is: 11,633.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,144.76 : 20,899.28 = 8,430.16 : x
  2. Step 2: Convert to fraction form
    15,144.76/20,899.28 = 8,430.16/x
  3. Step 3: Cross multiply
    15,144.76x = 20,899.28 × 8,430.16
  4. Step 4: Simplify right side
    15,144.76x = 176,184,274.28
  5. Step 5: Solve for x
    x = 176,184,274.28/15,144.76
  6. Step 6: Final answer
    x = 11,633.35

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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.