Home / 21,320.16-29,423.28-11,888.64

Finding the Fourth Proportional to 21,320.16, 29,423.28 and 11,888.64

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Solution

The fourth proportional to 21,320.16, 29,423.28 and 11,888.64 is: 16,407.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.16 : 29,423.28 = 11,888.64 : x
  2. Step 2: Convert to fraction form
    21,320.16/29,423.28 = 11,888.64/x
  3. Step 3: Cross multiply
    21,320.16x = 29,423.28 × 11,888.64
  4. Step 4: Simplify right side
    21,320.16x = 349,802,783.54
  5. Step 5: Solve for x
    x = 349,802,783.54/21,320.16
  6. Step 6: Final answer
    x = 16,407.14

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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.