Home / 28,531.17-39,374.19-15,784.14

Finding the Fourth Proportional to 28,531.17, 39,374.19 and 15,784.14

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Solution

The fourth proportional to 28,531.17, 39,374.19 and 15,784.14 is: 21,782.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,531.17 : 39,374.19 = 15,784.14 : x
  2. Step 2: Convert to fraction form
    28,531.17/39,374.19 = 15,784.14/x
  3. Step 3: Cross multiply
    28,531.17x = 39,374.19 × 15,784.14
  4. Step 4: Simplify right side
    28,531.17x = 621,487,875.00
  5. Step 5: Solve for x
    x = 621,487,875.00/28,531.17
  6. Step 6: Final answer
    x = 21,782.77

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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.