Home / 30,005.72-45,013.40-15,208.64

Finding the Fourth Proportional to 30,005.72, 45,013.40 and 15,208.64

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Solution

The fourth proportional to 30,005.72, 45,013.40 and 15,208.64 is: 22,815.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,005.72 : 45,013.40 = 15,208.64 : x
  2. Step 2: Convert to fraction form
    30,005.72/45,013.40 = 15,208.64/x
  3. Step 3: Cross multiply
    30,005.72x = 45,013.40 × 15,208.64
  4. Step 4: Simplify right side
    30,005.72x = 684,592,595.78
  5. Step 5: Solve for x
    x = 684,592,595.78/30,005.72
  6. Step 6: Final answer
    x = 22,815.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.