Home / 18,675.48-28,030.80-12,439.89

Finding the Fourth Proportional to 18,675.48, 28,030.80 and 12,439.89

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Solution

The fourth proportional to 18,675.48, 28,030.80 and 12,439.89 is: 18,671.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,675.48 : 28,030.80 = 12,439.89 : x
  2. Step 2: Convert to fraction form
    18,675.48/28,030.80 = 12,439.89/x
  3. Step 3: Cross multiply
    18,675.48x = 28,030.80 × 12,439.89
  4. Step 4: Simplify right side
    18,675.48x = 348,700,068.61
  5. Step 5: Solve for x
    x = 348,700,068.61/18,675.48
  6. Step 6: Final answer
    x = 18,671.55

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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.