Home / 15,470.40-21,335.40-12,485.28

Finding the Fourth Proportional to 15,470.40, 21,335.40 and 12,485.28

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Solution

The fourth proportional to 15,470.40, 21,335.40 and 12,485.28 is: 17,218.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,470.40 : 21,335.40 = 12,485.28 : x
  2. Step 2: Convert to fraction form
    15,470.40/21,335.40 = 12,485.28/x
  3. Step 3: Cross multiply
    15,470.40x = 21,335.40 × 12,485.28
  4. Step 4: Simplify right side
    15,470.40x = 266,378,442.91
  5. Step 5: Solve for x
    x = 266,378,442.91/15,470.40
  6. Step 6: Final answer
    x = 17,218.59

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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.