Home / 21,369.12-29,502-15,416.16

Finding the Fourth Proportional to 21,369.12, 29,502 and 15,416.16

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Solution

The fourth proportional to 21,369.12, 29,502 and 15,416.16 is: 21,283.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,369.12 : 29,502 = 15,416.16 : x
  2. Step 2: Convert to fraction form
    21,369.12/29,502 = 15,416.16/x
  3. Step 3: Cross multiply
    21,369.12x = 29,502 × 15,416.16
  4. Step 4: Simplify right side
    21,369.12x = 454,807,552.32
  5. Step 5: Solve for x
    x = 454,807,552.32/21,369.12
  6. Step 6: Final answer
    x = 21,283.40

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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.