Home / 28,683.40-39,602.16-21,138.24

Finding the Fourth Proportional to 28,683.40, 39,602.16 and 21,138.24

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Solution

The fourth proportional to 28,683.40, 39,602.16 and 21,138.24 is: 29,184.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,683.40 : 39,602.16 = 21,138.24 : x
  2. Step 2: Convert to fraction form
    28,683.40/39,602.16 = 21,138.24/x
  3. Step 3: Cross multiply
    28,683.40x = 39,602.16 × 21,138.24
  4. Step 4: Simplify right side
    28,683.40x = 837,119,962.60
  5. Step 5: Solve for x
    x = 837,119,962.60/28,683.40
  6. Step 6: Final answer
    x = 29,184.82

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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.