Home / 36,389.20-54,570.16-12,690.68

Finding the Fourth Proportional to 36,389.20, 54,570.16 and 12,690.68

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Solution

The fourth proportional to 36,389.20, 54,570.16 and 12,690.68 is: 19,031.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,389.20 : 54,570.16 = 12,690.68 : x
  2. Step 2: Convert to fraction form
    36,389.20/54,570.16 = 12,690.68/x
  3. Step 3: Cross multiply
    36,389.20x = 54,570.16 × 12,690.68
  4. Step 4: Simplify right side
    36,389.20x = 692,532,109.74
  5. Step 5: Solve for x
    x = 692,532,109.74/36,389.20
  6. Step 6: Final answer
    x = 19,031.25

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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.