Home / 28,122.80-38,809.56-15,376.16

Finding the Fourth Proportional to 28,122.80, 38,809.56 and 15,376.16

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Solution

The fourth proportional to 28,122.80, 38,809.56 and 15,376.16 is: 21,219.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,122.80 : 38,809.56 = 15,376.16 : x
  2. Step 2: Convert to fraction form
    28,122.80/38,809.56 = 15,376.16/x
  3. Step 3: Cross multiply
    28,122.80x = 38,809.56 × 15,376.16
  4. Step 4: Simplify right side
    28,122.80x = 596,742,004.09
  5. Step 5: Solve for x
    x = 596,742,004.09/28,122.80
  6. Step 6: Final answer
    x = 21,219.15

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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.