Home / 28,438.79-42,639.95-11,810.30

Finding the Fourth Proportional to 28,438.79, 42,639.95 and 11,810.30

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Solution

The fourth proportional to 28,438.79, 42,639.95 and 11,810.30 is: 17,707.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.79 : 42,639.95 = 11,810.30 : x
  2. Step 2: Convert to fraction form
    28,438.79/42,639.95 = 11,810.30/x
  3. Step 3: Cross multiply
    28,438.79x = 42,639.95 × 11,810.30
  4. Step 4: Simplify right side
    28,438.79x = 503,590,388.29
  5. Step 5: Solve for x
    x = 503,590,388.29/28,438.79
  6. Step 6: Final answer
    x = 17,707.87

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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.