Home / 21,415.84-29,549.10-13,455.16

Finding the Fourth Proportional to 21,415.84, 29,549.10 and 13,455.16

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Solution

The fourth proportional to 21,415.84, 29,549.10 and 13,455.16 is: 18,565.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.84 : 29,549.10 = 13,455.16 : x
  2. Step 2: Convert to fraction form
    21,415.84/29,549.10 = 13,455.16/x
  3. Step 3: Cross multiply
    21,415.84x = 29,549.10 × 13,455.16
  4. Step 4: Simplify right side
    21,415.84x = 397,587,868.36
  5. Step 5: Solve for x
    x = 397,587,868.36/21,415.84
  6. Step 6: Final answer
    x = 18,565.13

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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.