Home / 30,129.87-45,135.98-14,312.39

Finding the Fourth Proportional to 30,129.87, 45,135.98 and 14,312.39

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Solution

The fourth proportional to 30,129.87, 45,135.98 and 14,312.39 is: 21,440.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,129.87 : 45,135.98 = 14,312.39 : x
  2. Step 2: Convert to fraction form
    30,129.87/45,135.98 = 14,312.39/x
  3. Step 3: Cross multiply
    30,129.87x = 45,135.98 × 14,312.39
  4. Step 4: Simplify right side
    30,129.87x = 646,003,677.23
  5. Step 5: Solve for x
    x = 646,003,677.23/30,129.87
  6. Step 6: Final answer
    x = 21,440.64

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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.