Home / 15,292.40-21,108-9,988.04

Finding the Fourth Proportional to 15,292.40, 21,108 and 9,988.04

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Solution

The fourth proportional to 15,292.40, 21,108 and 9,988.04 is: 13,786.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,292.40 : 21,108 = 9,988.04 : x
  2. Step 2: Convert to fraction form
    15,292.40/21,108 = 9,988.04/x
  3. Step 3: Cross multiply
    15,292.40x = 21,108 × 9,988.04
  4. Step 4: Simplify right side
    15,292.40x = 210,827,548.32
  5. Step 5: Solve for x
    x = 210,827,548.32/15,292.40
  6. Step 6: Final answer
    x = 13,786.43

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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.