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Finding the Fourth Proportional to 15,249,978.65, 21,039,709.67 and 9,746,574.95

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Solution

The fourth proportional to 15,249,978.65, 21,039,709.67 and 9,746,574.95 is: 13,446,911.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,249,978.65 : 21,039,709.67 = 9,746,574.95 : x
  2. Step 2: Convert to fraction form
    15,249,978.65/21,039,709.67 = 9,746,574.95/x
  3. Step 3: Cross multiply
    15,249,978.65x = 21,039,709.67 × 9,746,574.95
  4. Step 4: Simplify right side
    15,249,978.65x = 205,065,107,070,963.34
  5. Step 5: Solve for x
    x = 205,065,107,070,963.34/15,249,978.65
  6. Step 6: Final answer
    x = 13,446,911.09

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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.