Home / 15,384.16-21,228.40-8,669.28

Finding the Fourth Proportional to 15,384.16, 21,228.40 and 8,669.28

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Solution

The fourth proportional to 15,384.16, 21,228.40 and 8,669.28 is: 11,962.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,384.16 : 21,228.40 = 8,669.28 : x
  2. Step 2: Convert to fraction form
    15,384.16/21,228.40 = 8,669.28/x
  3. Step 3: Cross multiply
    15,384.16x = 21,228.40 × 8,669.28
  4. Step 4: Simplify right side
    15,384.16x = 184,034,943.55
  5. Step 5: Solve for x
    x = 184,034,943.55/15,384.16
  6. Step 6: Final answer
    x = 11,962.63

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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.