Home / 15,283.26-21,095.40-9,978.90

Finding the Fourth Proportional to 15,283.26, 21,095.40 and 9,978.90

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Solution

The fourth proportional to 15,283.26, 21,095.40 and 9,978.90 is: 13,773.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,283.26 : 21,095.40 = 9,978.90 : x
  2. Step 2: Convert to fraction form
    15,283.26/21,095.40 = 9,978.90/x
  3. Step 3: Cross multiply
    15,283.26x = 21,095.40 × 9,978.90
  4. Step 4: Simplify right side
    15,283.26x = 210,508,887.06
  5. Step 5: Solve for x
    x = 210,508,887.06/15,283.26
  6. Step 6: Final answer
    x = 13,773.82

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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.