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Finding the Fourth Proportional to 15,506.40, 21,398.40 and 8,433.12

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Solution

The fourth proportional to 15,506.40, 21,398.40 and 8,433.12 is: 11,637.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,506.40 : 21,398.40 = 8,433.12 : x
  2. Step 2: Convert to fraction form
    15,506.40/21,398.40 = 8,433.12/x
  3. Step 3: Cross multiply
    15,506.40x = 21,398.40 × 8,433.12
  4. Step 4: Simplify right side
    15,506.40x = 180,455,275.01
  5. Step 5: Solve for x
    x = 180,455,275.01/15,506.40
  6. Step 6: Final answer
    x = 11,637.47

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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.