Home / 20,384.60-28,126.80-12,316.59

Finding the Fourth Proportional to 20,384.60, 28,126.80 and 12,316.59

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Solution

The fourth proportional to 20,384.60, 28,126.80 and 12,316.59 is: 16,994.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.60 : 28,126.80 = 12,316.59 : x
  2. Step 2: Convert to fraction form
    20,384.60/28,126.80 = 12,316.59/x
  3. Step 3: Cross multiply
    20,384.60x = 28,126.80 × 12,316.59
  4. Step 4: Simplify right side
    20,384.60x = 346,426,263.61
  5. Step 5: Solve for x
    x = 346,426,263.61/20,384.60
  6. Step 6: Final answer
    x = 16,994.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.