Home / 28,586.10-42,903.45-12,815.40

Finding the Fourth Proportional to 28,586.10, 42,903.45 and 12,815.40

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Solution

The fourth proportional to 28,586.10, 42,903.45 and 12,815.40 is: 19,233.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,586.10 : 42,903.45 = 12,815.40 : x
  2. Step 2: Convert to fraction form
    28,586.10/42,903.45 = 12,815.40/x
  3. Step 3: Cross multiply
    28,586.10x = 42,903.45 × 12,815.40
  4. Step 4: Simplify right side
    28,586.10x = 549,824,873.13
  5. Step 5: Solve for x
    x = 549,824,873.13/28,586.10
  6. Step 6: Final answer
    x = 19,233.99

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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.