Home / 28,663.40-42,995.10-13,111.40

Finding the Fourth Proportional to 28,663.40, 42,995.10 and 13,111.40

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Solution

The fourth proportional to 28,663.40, 42,995.10 and 13,111.40 is: 19,667.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,663.40 : 42,995.10 = 13,111.40 : x
  2. Step 2: Convert to fraction form
    28,663.40/42,995.10 = 13,111.40/x
  3. Step 3: Cross multiply
    28,663.40x = 42,995.10 × 13,111.40
  4. Step 4: Simplify right side
    28,663.40x = 563,725,954.14
  5. Step 5: Solve for x
    x = 563,725,954.14/28,663.40
  6. Step 6: Final answer
    x = 19,667.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.