Home / 15,430.81-21,300.12-10,127.35

Finding the Fourth Proportional to 15,430.81, 21,300.12 and 10,127.35

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Solution

The fourth proportional to 15,430.81, 21,300.12 and 10,127.35 is: 13,979.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.81 : 21,300.12 = 10,127.35 : x
  2. Step 2: Convert to fraction form
    15,430.81/21,300.12 = 10,127.35/x
  3. Step 3: Cross multiply
    15,430.81x = 21,300.12 × 10,127.35
  4. Step 4: Simplify right side
    15,430.81x = 215,713,770.28
  5. Step 5: Solve for x
    x = 215,713,770.28/15,430.81
  6. Step 6: Final answer
    x = 13,979.42

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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.