Home / 15,510.35-21,392.82-9,840.21

Finding the Fourth Proportional to 15,510.35, 21,392.82 and 9,840.21

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Solution

The fourth proportional to 15,510.35, 21,392.82 and 9,840.21 is: 13,572.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,510.35 : 21,392.82 = 9,840.21 : x
  2. Step 2: Convert to fraction form
    15,510.35/21,392.82 = 9,840.21/x
  3. Step 3: Cross multiply
    15,510.35x = 21,392.82 × 9,840.21
  4. Step 4: Simplify right side
    15,510.35x = 210,509,841.29
  5. Step 5: Solve for x
    x = 210,509,841.29/15,510.35
  6. Step 6: Final answer
    x = 13,572.22

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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.