Home / 28,121.10-38,807.14-15,374.08

Finding the Fourth Proportional to 28,121.10, 38,807.14 and 15,374.08

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Solution

The fourth proportional to 28,121.10, 38,807.14 and 15,374.08 is: 21,216.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.10 : 38,807.14 = 15,374.08 : x
  2. Step 2: Convert to fraction form
    28,121.10/38,807.14 = 15,374.08/x
  3. Step 3: Cross multiply
    28,121.10x = 38,807.14 × 15,374.08
  4. Step 4: Simplify right side
    28,121.10x = 596,623,983.07
  5. Step 5: Solve for x
    x = 596,623,983.07/28,121.10
  6. Step 6: Final answer
    x = 21,216.24

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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.