Home / 28,121,018.72-38,805,444.88-15,728,718.40

Finding the Fourth Proportional to 28,121,018.72, 38,805,444.88 and 15,728,718.40

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Solution

The fourth proportional to 28,121,018.72, 38,805,444.88 and 15,728,718.40 is: 21,704,758.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121,018.72 : 38,805,444.88 = 15,728,718.40 : x
  2. Step 2: Convert to fraction form
    28,121,018.72/38,805,444.88 = 15,728,718.40/x
  3. Step 3: Cross multiply
    28,121,018.72x = 38,805,444.88 × 15,728,718.40
  4. Step 4: Simplify right side
    28,121,018.72x = 610,359,914,904,241.88
  5. Step 5: Solve for x
    x = 610,359,914,904,241.88/28,121,018.72
  6. Step 6: Final answer
    x = 21,704,758.32

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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.