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Finding the Fourth Proportional to 10,521.93, 15,782.89 and 7,018.78

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Solution

The fourth proportional to 10,521.93, 15,782.89 and 7,018.78 is: 10,528.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.93 : 15,782.89 = 7,018.78 : x
  2. Step 2: Convert to fraction form
    10,521.93/15,782.89 = 7,018.78/x
  3. Step 3: Cross multiply
    10,521.93x = 15,782.89 × 7,018.78
  4. Step 4: Simplify right side
    10,521.93x = 110,776,562.53
  5. Step 5: Solve for x
    x = 110,776,562.53/10,521.93
  6. Step 6: Final answer
    x = 10,528.16

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.