Home / 30,190.64-45,271.40-12,655.76

Finding the Fourth Proportional to 30,190.64, 45,271.40 and 12,655.76

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Solution

The fourth proportional to 30,190.64, 45,271.40 and 12,655.76 is: 18,977.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,190.64 : 45,271.40 = 12,655.76 : x
  2. Step 2: Convert to fraction form
    30,190.64/45,271.40 = 12,655.76/x
  3. Step 3: Cross multiply
    30,190.64x = 45,271.40 × 12,655.76
  4. Step 4: Simplify right side
    30,190.64x = 572,943,683.63
  5. Step 5: Solve for x
    x = 572,943,683.63/30,190.64
  6. Step 6: Final answer
    x = 18,977.53

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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.