Home / 30,005.40-45,027.98-12,475.20

Finding the Fourth Proportional to 30,005.40, 45,027.98 and 12,475.20

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Solution

The fourth proportional to 30,005.40, 45,027.98 and 12,475.20 is: 18,721.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,005.40 : 45,027.98 = 12,475.20 : x
  2. Step 2: Convert to fraction form
    30,005.40/45,027.98 = 12,475.20/x
  3. Step 3: Cross multiply
    30,005.40x = 45,027.98 × 12,475.20
  4. Step 4: Simplify right side
    30,005.40x = 561,733,056.10
  5. Step 5: Solve for x
    x = 561,733,056.10/30,005.40
  6. Step 6: Final answer
    x = 18,721.07

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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.