Home / 28,005.36-38,647.40-15,430

Finding the Fourth Proportional to 28,005.36, 38,647.40 and 15,430

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Solution

The fourth proportional to 28,005.36, 38,647.40 and 15,430 is: 21,293.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,005.36 : 38,647.40 = 15,430 : x
  2. Step 2: Convert to fraction form
    28,005.36/38,647.40 = 15,430/x
  3. Step 3: Cross multiply
    28,005.36x = 38,647.40 × 15,430
  4. Step 4: Simplify right side
    28,005.36x = 596,329,382
  5. Step 5: Solve for x
    x = 596,329,382/28,005.36
  6. Step 6: Final answer
    x = 21,293.40

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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.