Home / 30,216.60-45,341.10-12,688.20

Finding the Fourth Proportional to 30,216.60, 45,341.10 and 12,688.20

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Solution

The fourth proportional to 30,216.60, 45,341.10 and 12,688.20 is: 19,039.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,216.60 : 45,341.10 = 12,688.20 : x
  2. Step 2: Convert to fraction form
    30,216.60/45,341.10 = 12,688.20/x
  3. Step 3: Cross multiply
    30,216.60x = 45,341.10 × 12,688.20
  4. Step 4: Simplify right side
    30,216.60x = 575,296,945.02
  5. Step 5: Solve for x
    x = 575,296,945.02/30,216.60
  6. Step 6: Final answer
    x = 19,039.10

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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.