Home / 30,130.95-45,178.20-13,487.88

Finding the Fourth Proportional to 30,130.95, 45,178.20 and 13,487.88

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Solution

The fourth proportional to 30,130.95, 45,178.20 and 13,487.88 is: 20,223.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,130.95 : 45,178.20 = 13,487.88 : x
  2. Step 2: Convert to fraction form
    30,130.95/45,178.20 = 13,487.88/x
  3. Step 3: Cross multiply
    30,130.95x = 45,178.20 × 13,487.88
  4. Step 4: Simplify right side
    30,130.95x = 609,358,140.22
  5. Step 5: Solve for x
    x = 609,358,140.22/30,130.95
  6. Step 6: Final answer
    x = 20,223.66

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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.