Home / 28,136.74-38,827.44-15,389.62

Finding the Fourth Proportional to 28,136.74, 38,827.44 and 15,389.62

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Solution

The fourth proportional to 28,136.74, 38,827.44 and 15,389.62 is: 21,236.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,136.74 : 38,827.44 = 15,389.62 : x
  2. Step 2: Convert to fraction form
    28,136.74/38,827.44 = 15,389.62/x
  3. Step 3: Cross multiply
    28,136.74x = 38,827.44 × 15,389.62
  4. Step 4: Simplify right side
    28,136.74x = 597,539,547.17
  5. Step 5: Solve for x
    x = 597,539,547.17/28,136.74
  6. Step 6: Final answer
    x = 21,236.99

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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.