Home / 15,328.16-21,152.40-8,613.84

Finding the Fourth Proportional to 15,328.16, 21,152.40 and 8,613.84

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Solution

The fourth proportional to 15,328.16, 21,152.40 and 8,613.84 is: 11,886.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,328.16 : 21,152.40 = 8,613.84 : x
  2. Step 2: Convert to fraction form
    15,328.16/21,152.40 = 8,613.84/x
  3. Step 3: Cross multiply
    15,328.16x = 21,152.40 × 8,613.84
  4. Step 4: Simplify right side
    15,328.16x = 182,203,389.22
  5. Step 5: Solve for x
    x = 182,203,389.22/15,328.16
  6. Step 6: Final answer
    x = 11,886.84

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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.