Home / 28,457.12-39,273.15-15,711.47

Finding the Fourth Proportional to 28,457.12, 39,273.15 and 15,711.47

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Solution

The fourth proportional to 28,457.12, 39,273.15 and 15,711.47 is: 21,683.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,457.12 : 39,273.15 = 15,711.47 : x
  2. Step 2: Convert to fraction form
    28,457.12/39,273.15 = 15,711.47/x
  3. Step 3: Cross multiply
    28,457.12x = 39,273.15 × 15,711.47
  4. Step 4: Simplify right side
    28,457.12x = 617,038,927.86
  5. Step 5: Solve for x
    x = 617,038,927.86/28,457.12
  6. Step 6: Final answer
    x = 21,683.11

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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.