Home / 28,143.60-38,838.36-15,569.04

Finding the Fourth Proportional to 28,143.60, 38,838.36 and 15,569.04

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Solution

The fourth proportional to 28,143.60, 38,838.36 and 15,569.04 is: 21,485.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.60 : 38,838.36 = 15,569.04 : x
  2. Step 2: Convert to fraction form
    28,143.60/38,838.36 = 15,569.04/x
  3. Step 3: Cross multiply
    28,143.60x = 38,838.36 × 15,569.04
  4. Step 4: Simplify right side
    28,143.60x = 604,675,980.37
  5. Step 5: Solve for x
    x = 604,675,980.37/28,143.60
  6. Step 6: Final answer
    x = 21,485.38

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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.