Home / 15,312.81-21,130.16-9,345.95

Finding the Fourth Proportional to 15,312.81, 21,130.16 and 9,345.95

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Solution

The fourth proportional to 15,312.81, 21,130.16 and 9,345.95 is: 12,896.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,312.81 : 21,130.16 = 9,345.95 : x
  2. Step 2: Convert to fraction form
    15,312.81/21,130.16 = 9,345.95/x
  3. Step 3: Cross multiply
    15,312.81x = 21,130.16 × 9,345.95
  4. Step 4: Simplify right side
    15,312.81x = 197,481,266.47
  5. Step 5: Solve for x
    x = 197,481,266.47/15,312.81
  6. Step 6: Final answer
    x = 12,896.47

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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.