Home / 28,451.70-42,686.19-12,869.46

Finding the Fourth Proportional to 28,451.70, 42,686.19 and 12,869.46

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Solution

The fourth proportional to 28,451.70, 42,686.19 and 12,869.46 is: 19,308.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,451.70 : 42,686.19 = 12,869.46 : x
  2. Step 2: Convert to fraction form
    28,451.70/42,686.19 = 12,869.46/x
  3. Step 3: Cross multiply
    28,451.70x = 42,686.19 × 12,869.46
  4. Step 4: Simplify right side
    28,451.70x = 549,348,214.76
  5. Step 5: Solve for x
    x = 549,348,214.76/28,451.70
  6. Step 6: Final answer
    x = 19,308.10

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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.