Home / 28,683.81-39,572.60-21,148.07

Finding the Fourth Proportional to 28,683.81, 39,572.60 and 21,148.07

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Solution

The fourth proportional to 28,683.81, 39,572.60 and 21,148.07 is: 29,176.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,683.81 : 39,572.60 = 21,148.07 : x
  2. Step 2: Convert to fraction form
    28,683.81/39,572.60 = 21,148.07/x
  3. Step 3: Cross multiply
    28,683.81x = 39,572.60 × 21,148.07
  4. Step 4: Simplify right side
    28,683.81x = 836,883,811.28
  5. Step 5: Solve for x
    x = 836,883,811.28/28,683.81
  6. Step 6: Final answer
    x = 29,176.17

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1.5x scale

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.