Home / 13,490.64-18,615.18-7,521.45

Finding the Fourth Proportional to 13,490.64, 18,615.18 and 7,521.45

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Solution

The fourth proportional to 13,490.64, 18,615.18 and 7,521.45 is: 10,378.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.64 : 18,615.18 = 7,521.45 : x
  2. Step 2: Convert to fraction form
    13,490.64/18,615.18 = 7,521.45/x
  3. Step 3: Cross multiply
    13,490.64x = 18,615.18 × 7,521.45
  4. Step 4: Simplify right side
    13,490.64x = 140,013,145.61
  5. Step 5: Solve for x
    x = 140,013,145.61/13,490.64
  6. Step 6: Final answer
    x = 10,378.54

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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.