Home / 30,214.80-45,327.60-12,686.40

Finding the Fourth Proportional to 30,214.80, 45,327.60 and 12,686.40

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Solution

The fourth proportional to 30,214.80, 45,327.60 and 12,686.40 is: 19,031.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,214.80 : 45,327.60 = 12,686.40 : x
  2. Step 2: Convert to fraction form
    30,214.80/45,327.60 = 12,686.40/x
  3. Step 3: Cross multiply
    30,214.80x = 45,327.60 × 12,686.40
  4. Step 4: Simplify right side
    30,214.80x = 575,044,064.64
  5. Step 5: Solve for x
    x = 575,044,064.64/30,214.80
  6. Step 6: Final answer
    x = 19,031.87

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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.